Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac7ffbff5e61abf…

MALICIOUS

PDF

43.5 KB Created: 2020-10-17 17:41:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 14a54c66674abcead0216c13048973a4 SHA-1: 94f3e2e355038f204a21c8e1299eb00f8a677fab SHA-256: 5ac7ffbff5e61abfd1a933826aa9b881a89404e4ddfe6bde9019e631154ef5e4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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://ttraff.me/123?keyword=jm-103+jaundice+meter+manual In PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/f6b9193d1f016.pdfIn PDF document text
    • https://pisanofinupu.weebly.com/uploads/1/3/1/4/131437881/guxomufasozo.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/tuxegape-tugivexadokugi.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/7775416.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/594c5f86b776.pdfIn PDF document text
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/5167020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f88c1d86c09c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375339/normal_5f894331333ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/9010/9097/files/add_onclick_event_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/4660/8282/files/genetuxokinuxuna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8464/7073/files/alfred_hitchcock_lamb_to_the_slaughter_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c9666ce-69af-4409-9808-7a26dd3a204a/33623184839.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fa3d639-7853-449a-a9fe-683bbb79ae57/nivapajivoguxurinevuzawaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/965b53f4-5390-4494-ac6e-d3ae7e10bdff/35137607463.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d7684f6-f064-463b-a83f-49aaced210fb/64587397490.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fbc3233e-7ea0-44fb-a140-cf64be1ea9c2/lewulajikudixubakami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25bf328e-08e3-4ea2-accf-feea5f1bf54c/1906376650.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C59 5360 bytes
SHA-256: 16d5cc43100dadbd120a0e3b0f1eb4873780d59b74d86ae41554affe3bcc7c66
font_01_sfnt_off00007e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7C 10180 bytes
SHA-256: d262bec9b743477440435b03074812dcd4bf719a1310e69050706fba4c0ddcbb

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