Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf3b2a9d722382de…

MALICIOUS

PDF

42.2 KB Created: 2020-09-11 03:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad78e923db25af371e1579c0c978bd3c SHA-1: 3d3374c855220324e7f6e22fb45baf8f79d530ab SHA-256: cf3b2a9d722382de0c7c66092cf6ee69f568d7bc4f3436dfdb5cada367a8c83b
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning or redirecting users to malicious sites. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the target URL, suggesting a social engineering attempt to lure the user to malicious content. No scripts were extracted, and the PDF structure itself is not inherently malicious beyond the embedded 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.me/wix?keyword=ecocentrism+and+anthropocentrism+pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/squat_bench_deadlift_program.pdf
    • https://cdn.shopify.com/s/files/1/0432/4687/8882/files/bunagujusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6577/7059/files/git_remove_tag.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/grind_on_me_song.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22945880436.pdf
    • https://cdn.shopify.com/s/files/1/0435/8914/0643/files/2058564936.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/bhojpuri_gana_dj_mein_karne_wala.pdf
    • https://cdn.shopify.com/s/files/1/0433/6815/3239/files/far_cry_4_xbox_one_achievement_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0438/1445/3410/files/xaxevugagog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9118/files/agouti_paca.pdf
    • https://cdn.shopify.com/s/files/1/0432/2348/2535/files/48487937892.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_off0000635a.bin
75478ef35d1537467f32d5f78545c7facc5ecd4407fe9add1e05b673a527af16		 pdf-font-stream PDF embedded font (sfnt) at offset 0x635A 5320 bytes
font_01_sfnt_off0000754a.bin
6e4abad2930b1760166690fd48d950c1f4597f75f80af251a699d6c3031a8ef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x754A 11500 bytes

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