Malicious PDF — malware analysis report

Static analysis result for SHA-256 8de1f7b696c3e7b5…

MALICIOUS

PDF

62.2 KB Created: 2020-10-15 21:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7c25fe9c17a9d11255e068bfedba5f0f SHA-1: d7537fcb3736ddfd384a39418df8f6256bd112a7 SHA-256: 8de1f7b696c3e7b5beb35acaae09db94edcbff13dff0b3b10219d1dcc6e23a29
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to external PDFs hosted on disposable domains. One of the primary links, 'https://gettraff.ru/pify?keyword=aa+mirror+plus+apk+descargar', is identified as a malicious redirector. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may also be intended to trick users into believing they need a password for an archive, a common tactic to bypass security scanning. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/pify?keyword=aa+mirror+plus+apk+descargar In PDF document text
    • https://site-1043094.mozfiles.com/files/1043094/84499014611.pdfIn PDF document text
    • https://site-1040221.mozfiles.com/files/1040221/vedegupakebasinadi.pdfIn PDF document text
    • https://site-1041932.mozfiles.com/files/1041932/jopejewidi.pdfIn PDF document text
    • https://site-1041684.mozfiles.com/files/1041684/2819038590.pdfIn PDF document text
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/a4dffa58a.pdfIn PDF document text
    • https://nobinetezo.weebly.com/uploads/1/3/0/9/130969761/a8c5456bfbd.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/b919b1ed8f.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/f5a6a.pdfIn PDF document text
    • https://site-1043613.mozfiles.com/files/1043613/65067404266.pdfIn PDF document text
    • https://site-1039404.mozfiles.com/files/1039404/98174742213.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/17f6092a-5ca9-4ae1-9775-856dc97cdd72/xegibekifonomovutur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44cb685b-a904-4104-9880-2223c6f52f6b/mepesuke.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46ae64a8-62b3-46c7-a95f-67327e935387/zolutonuveno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a20ef3-b455-4ecc-923f-fd797ad163cf/49424112681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e46a0d12-7ea1-490f-beee-b673e1022d60/dudiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5105955-a07d-4303-bfd9-66230cfd82c0/80922917417.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63033541-269d-4706-9d89-872cb751ed52/sokodekidizavo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b513a39c-ba51-45b0-b004-0f388b94a6d0/bigakiguruwajeweka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9dadf89-6ac9-4be8-87d8-96fef1a243ec/zufuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2f99c3-11cd-42e2-b28f-206d99d02849/luninapemuxuworenopofe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80b70277-b6ea-43af-b7b8-87db7c433436/girewikamux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cf91d25-b32e-4418-8b43-2f09ee36bb05/baxama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de797129-e9dd-47b1-be1b-8854f1231aeb/43047104163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d18a054-69b1-4720-8351-2cb9612d16ef/fofavulabegopugukejeza.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000078d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D2 5140 bytes
SHA-256: ef45223c4d4fd24c35edb395041534dd35a699a41dd402bf462c3def46c611f7
font_01_sfnt_off00008a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A39 2572 bytes
SHA-256: bc9cb2afbcb3fcc72e35458bd75b2a15d9891b1946b5cf5bb247045e6c732189
font_02_sfnt_off000094bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94BD 16532 bytes
SHA-256: fc174612cd06ba3f3744a95b1d846b3ceb641b341c63875cb74b746bd3b9dc3b
font_03_sfnt_off0000c730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC730 16168 bytes
SHA-256: 0216150ac0e5ade23b072752459620ec704bdac01526bfbadd96d51f96873ef3
font_04_sfnt_off0000dc37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC37 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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