Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ca222fdc8c41d3e…

MALICIOUS

PDF

42.5 KB Created: 2020-08-17 11:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f88852e3f1cd2ce1ec02c0e446a0b525 SHA-1: fcedd29a336305855983297f72828bacffaf693b SHA-256: 8ca222fdc8c41d3e4fb20bee757d80caf00555f58e4e0af7ae785bd47e367f23
152 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.cc/pify?keyword=android+auto+developer+documentation'. The document body also contains this URL and other embedded URLs, suggesting a lure to external content. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm strategy, likely for SEO manipulation or to obscure the malicious redirector. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/pify?keyword=android+auto+developer+documentation
    • http://buvitopal.paigespals.org/uploads/1/3/1/0/131070450/visadibedi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/wow_enchanting_leveling_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/nabosevapinagirufedife.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/zikuj.pdf
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/gunududokivuvetekameb.pdf
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/vagezawotebipos.pdf
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/zuwekipoloneligubozaxis.pdf
    • https://cdn.shopify.com/s/files/1/0431/0233/9232/files/mafalemigifariji.pdf
    • https://cdn.shopify.com/s/files/1/0437/8433/9613/files/kaththi_tamil_movie_video_songs_free.pdf
    • https://cdn.shopify.com/s/files/1/0449/1198/4795/files/xevoxazi.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_off00006ae7.bin
e8568bb684de366a8b98de04398845c2e840a47748168a9f9269430652009107		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE7 5092 bytes
font_01_sfnt_off00007c20.bin
c247be83af052f820d8d047e58f92daec3b65a6595bf1fc9db67a8fc71672da3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C20 9648 bytes

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