Malicious PDF — malware analysis report

Static analysis result for SHA-256 2699e756b4eccc0c…

MALICIOUS

PDF

44.7 KB Created: 2020-07-27 22:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30c7da422d3efc637079a0d0c93fb0aa SHA-1: df9cf30b2dd3ed6da867abf8869cbf1f006c6c28 SHA-256: 2699e756b4eccc0c059f1fde10e532740ee8a8ef3be9dfb1d94e00fe2d6f3c65
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm pattern, with numerous links hosted on Shopify domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was unreadable, but the presence of the malicious redirector and link farm is sufficient evidence of malicious intent.

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=blade+dancer+psp+guide
    • http://files.chickadeecanvasdesigns.com/uploads/1/3/1/3/131379324/javijujibisowuli.pdf
    • http://files.thissiteisunderconstruction.org/uploads/1/3/1/3/131380547/rejotogasamezuv-renozo-tigokenopo.pdf
    • http://files.usdinstitute.net/uploads/1/3/2/7/132740515/ximabonijoxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovetutokukike.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jewepogepavab.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/neloxikaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/6219719719.pdf
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/89379260097.pdf
    • https://cdn.shopify.com/s/files/1/0431/9602/2933/files/womitegejefokupe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/95797435072.pdf
    • https://cdn.shopify.com/s/files/1/0429/9892/3427/files/nibegojadut.pdf
    • https://cdn.shopify.com/s/files/1/0431/3271/5163/files/kosebarurulususomitib.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/wetarepezuwusod.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/37746129023.pdf
    • https://cdn.shopify.com/s/files/1/0440/9311/2472/files/negixarasebigoxe.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/
    • https://cdn.shopify.com/s/files/1/0437/6608/7838/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062f5.bin
4a216f5ae639f91bc3da864d03c76e19a794ed28ad377476b5b074a317020664		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F5 4500 bytes
font_01_sfnt_off000072c3.bin
ea40fcb6231deef7776bf952d0340f171a8a80b8b597bb3c57f950074997b4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 4980 bytes
font_02_sfnt_off000083aa.bin
12718ca77c23d1d1134fad64341571b85669862d35d91ce21659146e764514fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83AA 9888 bytes

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