Malicious PDF — malware analysis report

Static analysis result for SHA-256 93253f11d2cbd097…

MALICIOUS

PDF

87.0 KB Created: 2020-10-25 21:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 514981151c4e34dfa72f497e34189e14 SHA-1: 866d25b8bdc20f3e4bd8d3836ddac6b69f598d7a SHA-256: 93253f11d2cbd09710354ec7e780cb4140dbc5698bd00cb721446338cd75a424
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links, one of which, 'https://cctraff.ru/strik?keyword=ip+man+2+filme+me+titra+shqip', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of this URL, indicating the document's purpose is to redirect users to harmful content.

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://cctraff.ru/strik?keyword=ip+man+2+filme+me+titra+shqip In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f8ac11ca14c8.pdfIn PDF document text
    • https://vapaniwagivu.weebly.com/uploads/1/3/4/4/134442769/2039144.pdfIn PDF document text
    • https://bijifejutumaxob.weebly.com/uploads/1/3/1/3/131381781/fc249d4e635320.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/tasezekavudosewulo.pdfIn PDF document text
    • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/1588486.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/rivibozedugamag.pdfIn PDF document text
    • https://kabudededawizo.weebly.com/uploads/1/3/1/3/131383409/jibovesar.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/1/0500/5498/7969/files/73151527336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5665/9363/files/homeostasis_liquidos_corporales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/3432/8219/files/tilesaxijexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14938360-75b1-4082-9bd9-75c5f5122939/46163610576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a6091cf-bd2c-426f-a9d8-c891ecbe856f/gunaredazasudev.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/74226594055.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/zabotozufalogesob.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/voxakivawok.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00012aa1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12AA1 20760 bytes
SHA-256: 339135e6541486624f24819b98e9bf1d6a22d20dea943c17e7d3ff2adb56e85c
font_00_sfnt_off0000c4a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A7 13360 bytes
SHA-256: 21d306aba1bfddf7975c3fa2aff7f280bb50acf028fd3bfc08e0b99623e720db
font_01_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 5336 bytes
SHA-256: 412361425fe1836d7b1557f401221cdcc96ab7c33958371d948eeea86d53dd4b
font_02_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 12684 bytes
SHA-256: 706be70441baf3ccf23f8553e799b2bc590b9567f1ec19621d06795d6097e739

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