Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d613e79cd259718…

MALICIOUS

PDF

49.0 KB Created: 2020-09-02 10:43:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b11c32b36f57db28e732f8ded97a1ae6 SHA-1: bee664785c44916ebd9817f7188b98a76dd00857 SHA-256: 2d613e79cd25971883d7ac0c122e8b5b2d81177f5542d5ccbf98c70575493e78
150 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links directs the user to a known malicious redirector at ttraff.cc, disguised as a Google spreadsheet VLOOKUP example. The ML classifier strongly supports the malicious verdict, and the presence of a malicious redirector indicates a likely attempt to deliver a secondary payload or phish credentials.

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.cc/wix?keyword=google+spreadsheet+vlookup+example
    • https://static.usrfiles.com/ugd/cb4a18_bbd6b78ade4340289583488ce876752f.pdf
    • https://static.usrfiles.com/ugd/0ad6c7_20ab3cef82ff43d582102a5ad15a2912.pdf
    • https://static.usrfiles.com/ugd/b8c837_557042824bb64950b51f14f45456db10.pdf
    • https://static.usrfiles.com/ugd/2b3f46_457274c3ed6c49188758a3863243ed60.pdf
    • https://static.usrfiles.com/ugd/4c1554_92db862e56ae45e88444b6bde5139455.pdf
    • https://cdn.shopify.com/s/files/1/0436/5369/3593/files/bainite_transformation.pdf
    • https://cdn.shopify.com/s/files/1/0437/9328/5277/files/co___t_d___c__l__hangman_answer.pdf
    • https://cdn.shopify.com/s/files/1/0435/7003/6904/files/shadow_fight_2_modded.pdf
    • https://cdn.shopify.com/s/files/1/0430/7949/9940/files/20381934975.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6964/files/34125766357.pdf
    • https://cdn.shopify.com/s/files/1/0434/8765/8141/files/29359479935.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/5815692297.pdf
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/postgres_read_only_user.pdf
    • https://cdn.shopify.com/s/files/1/0434/4614/1093/files/leaves_of_grass_walt_whitman_poem_pd.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/wegazabemogitidobe.pdf
    • https://cdn.shopify.com/s/files/1/0450/6501/1352/files/june_calendar_printable.pdf
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/ziwilobowukurevawovibure.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_off00007b81.bin
2c827f96474d4db96300f50bf7c5a8dfbafda691c6657e823b05ff560427b820
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B81 5596 bytes
font_01_sfnt_off00008e6c.bin
a788a68b377b4bb883eb2edaac99c604234201c08d61502de0d641371a04c7a7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E6C 14108 bytes