Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4fbf6f6cd2074f7…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 15:20:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 921421eaf610a0db75229213d7e0e44b SHA-1: 929f41b6c54b28b0e6f7052d0fc52046e306ba03 SHA-256: d4fbf6f6cd2074f724b28a0e0c64a4d20d842dabb92e19644cb8fb770f19fe02
120 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the same malicious URL and a large number of other URLs, suggesting a link farm for SEO manipulation or redirection. The primary malicious URL is https://ttraff.cc/pify?keyword=best+free+casual+android+games+2018, which is used to lure users with a seemingly innocuous search result.

Heuristics 3

  • 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.
  • 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.cc/pify?keyword=best+free+casual+android+games+2018
    • http://fuxoten.carriesrealworld.com/uploads/1/3/1/4/131407406/vagegofa_notex_sovinew.pdf
    • http://xupaj.ballykeppogueminiaturehorses.com/uploads/1/3/1/3/131383483/781508b8294b34.pdf
    • http://fuwemigaz.shopfoxandfeather.net/uploads/1/3/1/6/131637047/fugowojikujiwetukoz.pdf
    • http://files.brucedelfosse.com/uploads/1/3/1/1/131164460/rugerotutamite_dodiwone_xexamenus.pdf
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/sugidijawedodiwexo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8830/5575/files/faxudukibamiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/9702/1861/files/bisufofubujob.pdf
    • https://cdn.shopify.com/s/files/1/0440/7004/3813/files/83062784696.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9034/files/95264449545.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/seizure_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0430/3945/7431/files/67644382456.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/chemguide_acyl_chloride_alcohol.pdf
    • https://cdn.shopify.com/s/files/1/0429/4128/4518/files/batepowupifusufomomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5796/2405/files/posilulunuvawig.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_off000070f3.bin
ee976115ce6024bf2ae6ada07f760f6991ce064deef04d9f407b3cc966950434		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70F3 5908 bytes
font_01_sfnt_off000084f4.bin
7e738c8f273d0a6c5323b2b952e0a17ffcfa6a4776efaf430084dda74b37726a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F4 10420 bytes

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