Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb3259541dcd811d…

MALICIOUS

PDF

118.6 KB Created: 2020-08-12 02:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fb9595459c3c6e024f6f2052d54deab SHA-1: ff16363efae0d0c08baf2e544bb277248ac1730b SHA-256: cb3259541dcd811d075e58f4a2b8929d78f9fc569120ae3990237309654eadb5
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.ru/pify?keyword=bhopal+gas+disaster+pdf', which is part of a link farm designed to attract search engine traffic. The document body, though heavily obfuscated, contains references to the Bhopal gas disaster, likely as a lure to entice users to click the malicious link. No scripts were extracted, but the presence of numerous links and the redirector heuristic strongly suggest a phishing or redirection attack.

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.
  • 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.ru/pify?keyword=bhopal+gas+disaster+pdf
    • http://files.impact2success.org/uploads/1/3/1/6/131636828/e94500cd.pdf
    • http://files.carpenterbeeinteriors.com/uploads/1/3/0/8/130813821/repenunududebibu.pdf
    • http://files.straitduckguideservice.com/uploads/1/3/2/8/132814306/8878695.pdf
    • http://files.100womenquinte.com/uploads/1/3/0/9/130969472/gapirumepud.pdf
    • https://cdn.shopify.com/s/files/1/0437/4432/9877/files/letevipegitutekazak.pdf
    • https://cdn.shopify.com/s/files/1/0428/4681/4374/files/janujes.pdf
    • https://cdn.shopify.com/s/files/1/0450/4210/6518/files/sunudivubinuser.pdf
    • https://cdn.shopify.com/s/files/1/0438/8261/0843/files/android_tutorial_for_beginners_w3schools.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0422/files/94736289112.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0469/files/mixipox.pdf
    • https://cdn.shopify.com/s/files/1/0432/6916/1110/files/jinevuxabuvogafinesakiwo.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/fesawadetomu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6842/2309/files/stewart_calculus_early_transcendentals.pdf
    • https://cdn.shopify.com/s/files/1/0434/5787/2033/files/bokukatuxewevoduvepuvip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3631/9639/files/degotegeguzegipalenexiki.pdf
    • https://cdn.shopify.com/s/files/1/0435/4228/2399/files/47585973187.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/autocad_architecture_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001805a.bin
4ac556e3dff470559000e7b05f5475adaa9aa5859c0600284af5429637a363ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1805A 5352 bytes
font_01_sfnt_off00019284.bin
4d114e530e1af18c66b031f066a637c7ad68a0f3353708f85a893476e35e1809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19284 11044 bytes
font_02_sfnt_off0001b7b8.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7B8 16164 bytes

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