Malicious PDF — malware analysis report

Static analysis result for SHA-256 d64930d37ee9e3d6…

MALICIOUS

PDF

56.6 KB Created: 2020-08-13 14:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c32456e4c2906140c15cb66143efea3 SHA-1: 29c861dfad868b676138084b9c580f8130a961fa SHA-256: d64930d37ee9e3d637cc5a96c6e4e39446f238fdd56506d138e3f98717e29b48
150 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector pointing to 'https://ttraff.com/wb?keyword=brand%20awareness%20article%20pdf'. The document also features a large number of external PDF links, many hosted on shopify.com, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious sites through these links.

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.com/wb?keyword=brand%20awareness%20article%20pdf
    • http://kuwimorew.teacherdallas.com/uploads/1/3/1/8/131871864/9904502.pdf
    • http://files.beyondthedinnertable.com/uploads/1/3/0/7/130775370/5238031.pdf
    • http://files.dynamicfreightcarriers.com/uploads/1/3/1/3/131380177/1251197.pdf
    • http://files.chefcappyskitchen.com/uploads/1/3/0/7/130775429/kisunaxexunet.pdf
    • http://files.sleukrithmotionpicture.com/uploads/1/3/1/6/131636914/3948058.pdf
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/lopedisisepugig.pdf
    • https://cdn.shopify.com/s/files/1/0434/8208/7576/files/wonomegejenatabunofili.pdf
    • https://cdn.shopify.com/s/files/1/0431/3464/8474/files/65704947321.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/zaboferaboxawufeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/pancreatic_ascites.pdf
    • https://cdn.shopify.com/s/files/1/0432/6876/7912/files/77904999791.pdf
    • https://cdn.shopify.com/s/files/1/0436/3560/5664/files/puxeseraloxunel.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/popular_fairy_tales.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/4655404583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0291/2158/files/final_fantasy_xv_guide_piggyback.pdf
    • https://cdn.shopify.com/s/files/1/0431/3461/5706/files/dementia_clock_test.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_off00009fe4.bin
92aabc4329212b46ceb7f24f397335c030b4c49ac96869569e143c22fc45c5cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE4 5288 bytes
font_01_sfnt_off0000b202.bin
dc7825f4e1e6fb1ed043c255db2808cab8429995bb1b9eff29a56429e29ef1d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB202 10404 bytes

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