Malicious PDF — malware analysis report

Static analysis result for SHA-256 793cd2b91ed8f855…

MALICIOUS

PDF

34.5 KB Created: 2020-08-07 08:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98eeeb969c627278cc0f12bb7d10b6a3 SHA-1: 2b6523510c69a30b7e8caba3ac027e9236e53a34 SHA-256: 793cd2b91ed8f855b73d294fa062334a82e3f24baf8313d5dda710b85fe8f7d1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a link farm with numerous links, many pointing to Shopify domains, but one critical link redirects to `ttraff.ru`. This redirector is associated with malicious activity, suggesting a lure to download software. The presence of a malicious redirector and the SEO link farm technique strongly indicate a phishing or malware distribution attempt. The document body contains garbled text but includes the target URL, reinforcing the lure.

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/pify?keyword=foxit+mobile+pdf+reader+for+android+free+download
    • http://files.my-luxe-boutique-4you.com/uploads/1/3/0/7/130775125/roxelevepemu.pdf
    • http://files.biblebaptistpreschool.com/uploads/1/3/0/8/130873715/2b21c440624c.pdf
    • http://kipura.dragonpalmfitness.com/uploads/1/3/2/6/132683014/xaxupukowumoke.pdf
    • http://files.isiiv.com/uploads/1/3/1/4/131483592/nujuxajebuvenufe.pdf
    • https://cdn.shopify.com/s/files/1/0429/3410/8323/files/370_country_code.pdf
    • https://cdn.shopify.com/s/files/1/0438/3001/8210/files/85167929221.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/xigelijurovajew.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/vesinogurajozoxuxasinimos.pdf
    • https://cdn.shopify.com/s/files/1/0432/9403/2040/files/5980089460.pdf
    • https://cdn.shopify.com/s/files/1/0431/4444/6118/files/58921613754.pdf
    • https://cdn.shopify.com/s/files/1/0433/9525/2374/files/gajibafomulisulezezepuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8011835234.pdf
    • https://cdn.shopify.com/s/files/1/0432/6080/5280/files/jizovemerizim.pdf
    • https://cdn.shopify.com/s/files/1/0437/5393/0904/files/breeds_of_cattle.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.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_off000048c3.bin
faf2e640085cd3675dfed65334ba0bbcdf36423d481dfb0578e0a08f2e85c71d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x48C3 5264 bytes
font_01_sfnt_off00005aa7.bin
02114ef000a677133aca986510abb310eaa7bb1880b8abebf421cb15b953af23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA7 9996 bytes

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