Malicious PDF — malware analysis report

Static analysis result for SHA-256 c272d197aab79c73…

MALICIOUS

PDF

43.1 KB Created: 2020-08-15 01:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ab30b1a0da67ef16887e6ce848b7aa5f SHA-1: 1e48dd038701b24fcacb5e3bec3d4ddfbb80d922 SHA-256: c272d197aab79c73db896084d24ded67a9f01850c5afcd79a1e79083d4fcfe5e
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary redirector URL being https://ttraff.ru/pify?keyword=jazz+blues+music+free. This URL is part of a link farm designed to redirect users to malicious content, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. The ML classifier also strongly flagged this PDF as malicious. The document body appears to be obfuscated or corrupted, but the presence of numerous links strongly suggests a phishing or redirection attempt.

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.ru/pify?keyword=jazz+blues+music+free
    • http://gepogeka.wazzuor.com/uploads/1/3/1/6/131606758/famab_posuxawiwakawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5054/0964/files/53315452161.pdf
    • https://cdn.shopify.com/s/files/1/0435/2871/6440/files/22092904625.pdf
    • https://cdn.shopify.com/s/files/1/0431/0315/8433/files/32773550027.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/30440896694.pdf
    • https://cdn.shopify.com/s/files/1/0440/6634/1029/files/6820113593.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/51121345376.pdf
    • https://cdn.shopify.com/s/files/1/0428/4828/8934/files/20291416485.pdf
    • https://cdn.shopify.com/s/files/1/0436/1060/3677/files/fozubi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6240/2967/files/45195013224.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/feed_forward_backpropagation_neural_network.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/lawonozijakabeloledupa.pdf
    • https://cdn.shopify.com/s/files/1/0438/4541/9165/files/letting_ana_go.pdf
    • https://cdn.shopify.com/s/files/1/0438/7844/9307/files/ability_score_generator.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_off00006c42.bin
c3883e9ae45f6c9106b6f8b5457cd6a969a1dc225f6e4cc08c229a1979dacc1d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C42 5204 bytes
font_01_sfnt_off00007de1.bin
f1693fc90f7865775b37e7a62e074e5f41c9320550486bc7610b7e06d596ffc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 9860 bytes

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