Malicious PDF — malware analysis report

Static analysis result for SHA-256 44c9ab3bf64666ac…

MALICIOUS

PDF

46.0 KB Created: 2020-08-14 19:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7d5d034bf6771fbf7d31cbd6aa74c9c0 SHA-1: 2d0cfd1f4757d8f7cacd87a2f645818ff8b51315 SHA-256: 44c9ab3bf64666acb4fe49a0865fcab9f694fc70a1c98a6305768e68ebd1ed3a
120 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a 'pressure relief valve operation manual'. This link points to 'ttraff.ru', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, reinforcing the lure. The presence of a large number of external PDF links also suggests a link farm or SEO manipulation tactic to distribute malicious content.

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.ru/wb?keyword=pressure%20relief%20valve%20operation%20manual
    • http://files.naturallydoulasd.com/uploads/1/3/0/8/130873717/bivimizuxitemuwifun.pdf
    • http://mobivog.stochasticcitizenship.org/uploads/1/3/1/4/131483281/besibunokewenut.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51686393220.pdf
    • https://cdn.shopify.com/s/files/1/0429/7415/0809/files/62470304685.pdf
    • https://cdn.shopify.com/s/files/1/0435/5771/6117/files/97422148501.pdf
    • https://cdn.shopify.com/s/files/1/0438/2962/4992/files/vedazigerexelama.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5878/files/60003130952.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0437/2532/4439/files/john_deer_leaf_blower.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6730/files/71393538607.pdf
    • https://cdn.shopify.com/s/files/1/0431/6993/9612/files/40217267126.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/software_development_project_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/59108617731.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_off0000767e.bin
48f38183a91b562cc7824a2e8451857e4eff626ba222321cdea66cf0580130c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767E 5108 bytes
font_01_sfnt_off000087cf.bin
dfac7fd29a6f39e6d86514340e4c43bcdbaae77e480d6908c6bcc3ba444ac1e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87CF 10244 bytes

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