Malicious PDF — malware analysis report

Static analysis result for SHA-256 718b137591489b9c…

MALICIOUS

PDF

243.3 KB Created: 2020-08-06 08:27:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cf251a53a761a63297ce89a8a17d6aa SHA-1: 29d553bb0ec617917022835581439da54db90322 SHA-256: 718b137591489b9cb910403963eb2172add521607a01cda91598bc4985febf7a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains an embedded link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains text related to downloading an encyclopedia, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=telecharger+encyclopedie+marvel+pdf
    • http://files.crumpsalllaneprimary.org/uploads/1/3/1/4/131452938/sobudamelemujin.pdf
    • http://files.artz-rva.com/uploads/1/3/2/7/132740337/3a823353.pdf
    • http://files.missycampmusic.com/uploads/1/3/0/7/130775592/zotikelujotuwuxev.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/4090002743.pdf
    • https://cdn.shopify.com/s/files/1/0438/9571/8040/files/54726499551.pdf
    • https://cdn.shopify.com/s/files/1/0433/4069/3662/files/52411201393.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/39858795743.pdf
    • https://cdn.shopify.com/s/files/1/0429/3741/7891/files/texetut.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5591/files/hp_6700_premium_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/pawiwana.pdf
    • https://cdn.shopify.com/s/files/1/0436/2331/7662/files/xofiwawawezugu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fisebupujavilugux.pdf
    • https://cdn.shopify.com/s/files/1/0432/5556/2398/files/motubiwin.pdf
    • https://cdn.shopify.com/s/files/1/0437/5989/4689/files/96629232548.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/performance_budgeting.pdf
    • https://cdn.shopify.com/s/files/1/0431/5827/4205/files/1892406894.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/wasoranewulibuz.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2174/files/us_passport_fillable.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_off00038731.bin
c7b60a43a9984b6ade031392d1f39bd2bfc4a1398bd94a420da5909c0d9deac3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x38731 5504 bytes
font_01_sfnt_off000399d2.bin
3cfec85f72af12a6dddc784b50378e283cd0cbf2b68cf0edacb5ccab5b2376ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x399D2 10680 bytes

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