Malicious PDF — malware analysis report

Static analysis result for SHA-256 5db5e963c1388e53…

MALICIOUS

PDF

50.7 KB Created: 2020-08-26 14:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d07f9d6d54d060cbffa12bf310c23e43 SHA-1: 2d5c3f22e64813a3418e47feecb90bdd065c02bd SHA-256: 5db5e963c1388e531da16edcfd4677d7d9cda8ae99bb3d77aea8a9b583f5444a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination. The presence of advance-fee scam language in the document body further supports the malicious intent.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=igenetics+a+molecular+approach+3rd+e
    • http://rubilo.agbio-inc.com/uploads/1/3/2/6/132683130/316ed0b4faced.pdf
    • http://files.adamgormley.com.au/uploads/1/3/1/4/131406149/bajorud.pdf
    • http://files.nickboocock.com/uploads/1/3/0/9/130969440/gomebutagofagurim.pdf
    • http://pupefinax.robynpforrryan.com/uploads/1/3/2/6/132696063/pegekepogon.pdf
    • http://files.thewellonbeacon.com/uploads/1/3/1/4/131453543/sebuvoduxabofasimuma.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/1604/5222/files/97619329031.pdf
    • https://cdn.shopify.com/s/files/1/0438/3349/1613/files/porujep.pdf
    • https://cdn.shopify.com/s/files/1/0440/5762/4726/files/a_tale_of_memories.pdf
    • https://cdn.shopify.com/s/files/1/0433/8309/5459/files/posipesugawunupozev.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/45290289558.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8274/files/90381339592.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/grimshaw_argument_structure.pdf
    • https://cdn.shopify.com/s/files/1/0429/8434/1657/files/74861801861.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/john_legend_tonight_mp3_download_tooxclusive.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/lutotoxosuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jokopewizemaw.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_off00008771.bin
4af57c6cb2bcfc81c948077903679ee9f7fe7c3d4c105a59b4d678b3d5fc2e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8771 5588 bytes
font_01_sfnt_off00009a45.bin
1cabddceff3729db0413724e083d2efaeeef3ab68b7e2869f9e06866036921f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A45 10496 bytes

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