Malicious PDF — malware analysis report

Static analysis result for SHA-256 a650d9a0b138d23f…

MALICIOUS

PDF

44.7 KB Created: 2020-08-10 21:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eef0cd0a4c7ebab367e011509b6af999 SHA-1: a72e52b6d7101155f3d986fb0b27aa17bf72e0ae SHA-256: a650d9a0b138d23f4c384902fe7551bcaeb3a7cdaaf26d5518ea8055b6891d61
130 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many pointing to Shopify-hosted PDFs with generated slugs, indicating a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL, suggesting the primary intent is to redirect users to malicious content. No scripts were extracted from this sample.

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=acog+practice+bulletin+postpartum+hemorrhage+pdf
    • http://files.trebalmusic.com/uploads/1/3/2/7/132741339/figogoriro-voziriz-dejijuvur.pdf
    • http://kemovo.balisupertickets.net/uploads/1/3/2/6/132683165/4406197.pdf
    • http://files.mag-instruments.com/uploads/1/3/1/8/131856173/6569129.pdf
    • http://files.witchdoctorpoet.com/uploads/1/3/1/4/131482915/3bc15b.pdf
    • https://cdn.shopify.com/s/files/1/0434/5937/9357/files/xifizebafexajuperatitebuj.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/behavioral_game_theory.pdf
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/solakotunolidorawoze.pdf
    • https://cdn.shopify.com/s/files/1/0432/5172/8546/files/71321708030.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5258/files/atar_notes_biology.pdf
    • https://cdn.shopify.com/s/files/1/0431/1003/9719/files/3699670809.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/63269154894.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/servsafe_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/9938/0130/files/numekajigitomegibepi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9894/8255/files/zafeguposixogemezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8640/5022/files/74472101157.pdf
    • https://cdn.shopify.com/s/files/1/0428/4416/0156/files/erik_erikson_theory.pdf
    • https://cdn.shopify.com/s/files/1/0431/5355/5610/files/37762611882.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/gemefudozubujukuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9957/files/deniniwo.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_off00006fda.bin
1b54b81f7f1cd3306f9c6d27de32f92ad60d764a0f338ebc03aab1025574ca1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FDA 5700 bytes
font_01_sfnt_off0000830e.bin
9dc36853976d16886dcd6dbc9fe29af618435d74810b9f911213acfad5c108a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x830E 10088 bytes