Malicious PDF — malware analysis report

Static analysis result for SHA-256 8871240dc8a6e1c6…

MALICIOUS

PDF

44.2 KB Created: 2020-08-16 18:18:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d1caf23bb6ab9730c90e0db36094106 SHA-1: d7a95be2d2ef4ee6763970331334ba231b09c563 SHA-256: 8871240dc8a6e1c6cbbc95d052b26fba461180648b40b77f9e34fa31f3343e60
128 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=alternaria+brassicicola+pdf, which is flagged as malicious. Another heuristic indicates a PDF link farm, suggesting the document's primary purpose is to redirect users to external, potentially harmful, content.

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=alternaria+brassicicola+pdf
    • http://files.runningdeerfarm.com/uploads/1/3/1/4/131438002/13632b50dc.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/notinovarixes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4149/6986/files/dark_souls_3_pyromancer_pve_guide.pdf
    • https://cdn.shopify.com/s/files/1/0434/0265/7957/files/75109489295.pdf
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/negevojijebaduforewimivu.pdf
    • https://cdn.shopify.com/s/files/1/0435/9634/9602/files/19188923321.pdf
    • https://cdn.shopify.com/s/files/1/0448/5352/6690/files/xazolofanizamilokajamuxi.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/developing_assertiveness_skills.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/83936116402.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7141/files/amantes_para_sempre_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8901/files/modaserejobesajasinukize.pdf
    • https://cdn.shopify.com/s/files/1/0431/4651/0504/files/42770803386.pdf
    • https://cdn.shopify.com/s/files/1/0434/2336/7335/files/praise_god_from_whom_all_blessings_flow_chords.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_off00006fcb.bin
51d681544e5b3db9cd303fcd3d29c3a10e35e0a7ccf6aaaa95e832747d049686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FCB 5276 bytes
font_01_sfnt_off000081b4.bin
8571e6a5ec1a182dbd48b3ca6573a29856f66380721c3beb051bbd66df13023f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 10192 bytes

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