Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006bd0b5861e30a…

MALICIOUS

PDF

45.3 KB Created: 2020-09-05 22:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c05c13b613fc791573362652b5726169 SHA-1: 9673e8cc98c20c9b1827300fa785cee34b582e47 SHA-256: c006bd0b5861e30ac574b3a4561ae3a69a82602b9352d8cf119e32f54c0e7b1a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.link/wix?keyword=model+boat+building+plans`. This link is presented within the document body, disguised as a lure for "model boat building plans". The PDF also hosts a large number of external links, many pointing to Shopify, which is a common tactic for SEO poisoning to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.link/wix?keyword=model+boat+building+plans
    • http://www.fotolia.com''gt;from
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tokavurovapipemekimisam.pdf
    • https://cdn.shopify.com/s/files/1/0432/2718/5311/files/46931350326.pdf
    • https://cdn.shopify.com/s/files/1/0433/9315/5237/files/ginisebufisirabivitobad.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/wisuvokunuzejuw.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/financial_accounting_basics_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0434/7117/5846/files/dilozezasonijozipu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2068/1369/files/jubivojapotoxefin.pdf
    • https://static.usrfiles.com/ugd/63d3ad_fec9cc2ab3bf43bd97a89aac9a5eb536.pdf
    • https://static.usrfiles.com/ugd/f99735_ee2022ac65814442a9653a30b5bbde1e.pdf
    • https://cdn.shopify.com/s/files/1/0429/9577/7699/files/82018493807.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1716/files/16167361145.pdf
    • http://www.fotolia.com
    • 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_off000074cb.bin
d147812672d91cf595429ff2e9207129c7c359f6ec81689293c45ce5b7b54ba5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74CB 5176 bytes
font_01_sfnt_off0000867a.bin
e6eeb8f30f0404e7f604ff6ad109e3b3ff0e707246421cb65f0022ebadb747fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x867A 10228 bytes

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