Malicious PDF — malware analysis report

Static analysis result for SHA-256 79df26b16a19c9ea…

MALICIOUS

PDF

44.0 KB Created: 2020-08-11 15:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3bec229bb21c73f4d270c6e391ba191 SHA-1: 8992e4f3937f973bbef0edeaab11ade570657a2a SHA-256: 79df26b16a19c9eaee5929e42fb25eb9d37104704fa5f41e0a9840caf428432e
154 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, including a critical redirector link to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Costco carport instructions', suggesting a lure. The presence of many PDF links, some benign and some unknown, indicates a link farm strategy, likely to obscure the malicious redirector.

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.com/pify?keyword=costco+carport+instructions+pdf
    • http://gunujap.swimteamcotesaintlucaquatics.com/uploads/1/3/0/9/130969204/bazejenusidoka_sodegadesiz.pdf
    • http://files.artedelquarzo.com/uploads/1/3/0/7/130775108/303c582.pdf
    • http://wanewotew.zavalalibrary.org/uploads/1/3/1/4/131454012/jalodegepo.pdf
    • http://zufopow.incomelink.net/uploads/1/3/0/8/130874524/db4b474b9987a24.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/5827/5238/files/lulonosetinugo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0102/8503/files/44247419818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zizamazigunonafimav.pdf
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/55234444348.pdf
    • https://cdn.shopify.com/s/files/1/0433/6844/8165/files/mapixatu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1437/9930/files/epcrs_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0434/3903/0439/files/outliers_summary.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83142526711.pdf
    • https://cdn.shopify.com/s/files/1/0430/9975/0560/files/budebajuwutimekudik.pdf
    • https://cdn.shopify.com/s/files/1/0428/0667/3574/files/paxizetutol.pdf
    • https://cdn.shopify.com/s/files/1/0437/3312/3221/files/71120596435.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8504/files/free_trx_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/8064/6807/files/greenhouse_gases_and_global_warming.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_off00006f94.bin
59a31d85b28f5639d9832c59fc1da5dd4ec66ee177475a461508875e3f4fdee4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F94 5024 bytes
font_01_sfnt_off000080b4.bin
c01892706cda47f9f335e5fec35e86c0f2b5983ecbf67ab90845f04f47c2be4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80B4 9916 bytes

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