Malicious PDF — malware analysis report

Static analysis result for SHA-256 092365e3a7fc92ec…

MALICIOUS

PDF

73.6 KB Created: 2020-08-20 23:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a8b68449affcade9e3f82044b1bf2bf SHA-1: 5a72f4dd9388ea3b15d11b6145ed64609e4f2cd7 SHA-256: 092365e3a7fc92ec2cc55a226dcbd7053f40e0a390a9cf7980f7d58e16187028
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic, which is often used to distribute malicious content or improve search engine ranking for malicious sites.

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/pify?keyword=transformers+animated+autobots+vs+megatron
    • http://files.kamtectools.com/uploads/1/3/2/6/132683070/6998208.pdf
    • http://files.pinehavencamp.org/uploads/1/3/0/8/130813804/xetemativogozi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/8260/2914/files/21611189477.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/jamusitepewonigivagopas.pdf
    • https://cdn.shopify.com/s/files/1/0427/9291/1007/files/tamekalisefuxidow.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/bafil.pdf
    • https://cdn.shopify.com/s/files/1/0432/5549/6866/files/barreira_hematoenceflica.pdf
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/bunefabibibokuwav.pdf
    • https://cdn.shopify.com/s/files/1/0437/6828/3287/files/nick_drake_pink_moon_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/ketojanewa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/vodowulinonutebidazojin.pdf
    • https://cdn.shopify.com/s/files/1/0429/3240/4380/files/22560929258.pdf
    • https://cdn.shopify.com/s/files/1/0435/3340/2266/files/xamawujetutuvemukesewali.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_off0000e428.bin
90199f7d7f26a4a242ce2b79d273ccd542c7a941af0b72742c541b8870a86528
pdf-font-stream PDF embedded font (sfnt) at offset 0xE428 5344 bytes
font_01_sfnt_off0000f638.bin
8d72cc5a6b7de1a3e2432a38adb3fb6237c0e52da837095f2d88a09b6b80c5af
pdf-font-stream PDF embedded font (sfnt) at offset 0xF638 10408 bytes