Malicious PDF — malware analysis report

Static analysis result for SHA-256 071df6bfca8580f6…

MALICIOUS

PDF

44.2 KB Created: 2020-07-09 07:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04be28e6d356428514c523012b129c4a SHA-1: 871e51d4df388e2df630ebade2b8f07251e9d941 SHA-256: 071df6bfca8580f6737962502bd8e23f6c7c814819cca0e30cbc08b954536c77
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector, and a large number of other PDF links, indicating a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of malicious links suggests the document is designed to redirect users to harmful content or infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.ru/wb?keyword=types%20of%20transmission%20media%20pdf
    • http://files.totaltutoringservices.com/uploads/1/3/2/6/132695574/adb8d8d801fd.pdf
    • http://files.todayhousing.com/uploads/1/3/0/9/130969243/vanamogukalazak.pdf
    • http://files.fhcamd.org/uploads/1/3/1/6/131637034/5932877.pdf
    • http://files.az-tennisacademy.com/uploads/1/3/0/8/130873975/suriteve_sefexujirove.pdf
    • http://files.laptoppartstore.com/uploads/1/3/2/7/132712163/zumixine-fufanemuporeve.pdf
    • http://files.drlesgarson.com/uploads/1/3/0/7/130776123/1719573.pdf
    • http://files.infinityhealingcenter.com/uploads/1/3/0/7/130739503/9d10dc763a5a77.pdf
    • http://files.scholasticlead.com/uploads/1/3/0/7/130776408/3844128.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://supufusifiv.files.wordpress.com/2020/06/gafemigedonosuk.pdf
    • https://winasetuto.files.wordpress.com/2020/07/pajevegubebarogok.pdf
    • https://nijarabukexi809583250.files.wordpress.com/2020/06/3191580657.pdf
    • https://pexejopatewu.files.wordpress.com/2020/07/36604499805.pdf
    • https://mekenogana.files.wordpress.com/2020/07/62472584966.pdf
    • https://dolopuxiwad.files.wordpress.com/2020/07/lizinabulawixaf.pdf
    • https://dibevupajuwu.files.wordpress.com/2020/07/remowalidilunix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fadanamimurusekebunom.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16946396068.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/duwaxufezemurogagur.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fd5.bin
758a959dbde1c2d375cf72b6b626bb5cd1edf178b6b484c7ac771b9997e4d943		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD5 4996 bytes
font_01_sfnt_off000080b8.bin
833d0e2e76b1255967eba04a7c75c8f1544b6aae6d7db4ab3506dceb42b0a2c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B8 10228 bytes

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