Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fbfbafb59e18a2…

MALICIOUS

PDF

54.2 KB Created: 2020-08-30 16:53:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6e5e5da42b926f9f6493b0ed3873dd8 SHA-1: f012a7c6a50af1f2606076b066fed9d5eb53088d SHA-256: f2fbfbafb59e18a29732f75056df857463beec340dd5c194473f26ec48108f64
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to 'https://ttraff.ru/wix?keyword=treatment+of+systolic+hypertension+guidelines'. This URL is likely intended to lead the user to a malicious site. The document also contains a large number of embedded links, many of which point to Shopify domains, suggesting a link farm or SEO poisoning attempt to disguise the malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=treatment+of+systolic+hypertension+guidelines
    • https://static.usrfiles.com/ugd/47b1e8_17d9e081c95e43d5bfaddb010877a82f.pdf
    • https://static.usrfiles.com/ugd/b8c837_073592ebeac649b99be6b569b541cea0.pdf
    • https://static.usrfiles.com/ugd/b8c837_b84c6da799b543d1a62975f5d6b26b31.pdf
    • https://static.usrfiles.com/ugd/b8c837_d09ffebd3a0548338f097d7359f8c037.pdf
    • https://static.usrfiles.com/ugd/48f461_f8751616e52047ea9cc731012f6bb5cb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2017/2960/files/gojakolekuwazivelivavegof.pdf
    • https://cdn.shopify.com/s/files/1/0437/5950/1464/files/javascript_random_integer_in_range.pdf
    • https://cdn.shopify.com/s/files/1/0432/7741/8656/files/6270698825.pdf
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/88009244026.pdf
    • https://cdn.shopify.com/s/files/1/0445/4517/9807/files/android_authority_best_phone_giveaway.pdf
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/acute_glomerulonephritis.pdf
    • https://cdn.shopify.com/s/files/1/0430/8759/3632/files/50435207446.pdf
    • https://cdn.shopify.com/s/files/1/0430/7209/4362/files/insinkerator_evolution_pro_compact_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4421/6727/files/cookie_clicker_tips.pdf
    • https://cdn.shopify.com/s/files/1/0432/8685/5840/files/biological_invasions.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_off0000764a.bin
e345ebde7c722f3bf1bd2a91d96e64e69a81a1b0b0bb567f52bc646f2e7791c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x764A 5620 bytes
font_01_sfnt_off00008939.bin
6a7507dfe2b710fd1eb10ee4d36988bd6b5d1e349c1783845ac3b989e5952d50
pdf-font-stream PDF embedded font (sfnt) at offset 0x8939 6272 bytes
font_02_sfnt_off0000997f.bin
1e5f110550abf55ab421088866e5b19ff17978a8b0780fe5a27219ceeb1afdf7
pdf-font-stream PDF embedded font (sfnt) at offset 0x997F 15248 bytes