Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af7bf009b0344ba…

MALICIOUS

PDF

44.7 KB Created: 2020-08-21 21:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38e4e5c07d7c830707c6e32562f77884 SHA-1: 930da4c8b88a454fe4f13afca5ad5f2aca446b65 SHA-256: 4af7bf009b0344ba52e1dcaff0767df1ccc20229bd1021a2b6dbcd856f8feaef
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a lure related to restoring WhatsApp backups, combined with urgency language. It embeds numerous links, with a critical heuristic identifying a malicious redirector at 'ttraff.com'. This suggests the document's primary purpose is to redirect users to a malicious site, likely for credential harvesting or to download further payloads. No scripts were extracted, but the PDF structure and embedded links strongly indicate a phishing or redirection attack.

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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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
  • 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=restaurar+backup+whatsapp+android+no+iphone
    • http://files.aben4ace.org/uploads/1/3/1/6/131607029/9458139.pdf
    • http://winas.recraftandrelic.com/uploads/1/3/0/7/130776255/vilumuzoke_topifejefuguve.pdf
    • https://cdn.shopify.com/s/files/1/0432/1456/9640/files/dadorowuvonumu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6273/8592/files/appchina_apk_telecharger.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/sajitomax.pdf
    • https://cdn.shopify.com/s/files/1/0439/1842/6267/files/couch_to_5k_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/cambridge_a_level_economics_past_exam_papers.pdf
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/bixuxisatapuwetulufapuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/xarija.pdf
    • https://cdn.shopify.com/s/files/1/0434/4122/5880/files/2942802360.pdf
    • https://cdn.shopify.com/s/files/1/0435/1747/7019/files/xijipopijituwigidovijufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/vaparixarexarafukugigu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/18456096399.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/429325084.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/41851381001.pdf
    • https://cdn.shopify.com/s/files/1/0433/1202/1657/files/67175611806.pdf
    • https://cdn.shopify.com/s/files/1/0433/6982/4414/files/femanitenora.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007035.bin
087d8139980b3fa6144ef37764ac49e08fc289841994d05208a2edfeffd09408		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7035 5432 bytes
font_01_sfnt_off000082b3.bin
2083f264e8f21a161130139c0acc26d9747c1c39c2d866b1af793c1c2201b30f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82B3 10288 bytes

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