Malicious PDF — malware analysis report

Static analysis result for SHA-256 31239d9408cf728a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-08 09:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5495bb5a449fd84cbef00b7b19506f5d SHA-1: 0e9733e052f63b36b5c593541f517171810ac967 SHA-256: 31239d9408cf728a5c9dd70336a64c66e2598b5c22ec7075dfdf08a7a7e1b165
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.ru/pify?keyword=biafra+war+pdf. The document body, though heavily obfuscated, contains references to 'Biafra war pdf' and the wkhtmltopdf tool, suggesting a lure to disguise the malicious intent. The presence of a large number of external PDF links further supports a link farm or redirection attack pattern.

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/pify?keyword=biafra+war+pdf
    • http://lumuwegiv.kategrindon.com/uploads/1/3/1/3/131383949/vozugevibij.pdf
    • http://files.verduemedia.com/uploads/1/3/1/8/131871859/fujigagudutujotez.pdf
    • http://files.variablerateintercooling.com/uploads/1/3/1/3/131380870/7671165.pdf
    • http://files.carolvoss.com/uploads/1/3/0/7/130738484/keken.pdf
    • http://gefegu.poweroftheflowers.com/uploads/1/3/0/7/130775971/kexokusi-fotoripitapoxu-burunelifo-sisubale.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/48880371243.pdf
    • https://cdn.shopify.com/s/files/1/0437/5396/3678/files/ba_ii_plus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/5576/7967/files/34061375864.pdf
    • https://cdn.shopify.com/s/files/1/0436/3934/1216/files/lebabipanimet.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/kamoripirovagogex.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/abnormal_psychology_9th.pdf
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/orthographic_projection.pdf
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/dujutamabuwojogun.pdf
    • https://cdn.shopify.com/s/files/1/0435/6761/2067/files/runilusab.pdf
    • https://cdn.shopify.com/s/files/1/0431/7210/2301/files/antony_and_cleopatra_analysis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8424/2337/files/62476037306.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5348/files/30278060624.pdf
    • https://cdn.shopify.com/s/files/1/0437/7352/6178/files/66301343870.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_off00006572.bin
5b75d0a23d5f703ebf0d0c14df0dc7c145991603a988c19fe3aa0f214796cb66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6572 4968 bytes
font_01_sfnt_off0000767d.bin
2fe5ae233b069f85f23dbebcb85f7050cf40df73944e21854cc7025d603a2063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x767D 9892 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.