Malicious PDF — malware analysis report

Static analysis result for SHA-256 67bd205936fa7877…

MALICIOUS

PDF

34.9 KB Created: 2020-08-30 14:29:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 040f0f60604691c8c51327051b275390 SHA-1: 8b891494425a231c31093407e71da6e4d42b93bb SHA-256: 67bd205936fa7877f929ed2e365dfef3452d383f1ff0362affe579c7814c0d1a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector infrastructure, disguised as a book title. This is further supported by heuristics indicating a PDF link farm and a critical ML classification. The document body, though heavily obfuscated, contains the same malicious URL and other URLs pointing to Shopify, likely used to host further payloads or content. The primary attack vector appears to be luring the user to the malicious redirector.

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/wix?keyword=ruthless+by+william+de+mille+text
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2790/6206/files/49479273111.pdf
    • https://cdn.shopify.com/s/files/1/0433/4891/8440/files/34011221648.pdf
    • https://cdn.shopify.com/s/files/1/0434/7042/2180/files/jesebavisuwutiw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dedijadexurusefux.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/daxuwativubatopod.pdf
    • https://static.usrfiles.com/ugd/0aab01_ed40da153a4847afa2c8f71a0e92490d.pdf
    • https://static.usrfiles.com/ugd/e3ff21_8e65786330b44e7392253c10bf6d9936.pdf
    • https://static.usrfiles.com/ugd/1decf9_f29266971dfa4b8495edfa98a41d769f.pdf
    • https://static.usrfiles.com/ugd/5b9a87_904d93a17d93470da2059d53d5467246.pdf
    • https://static.usrfiles.com/ugd/5ed537_7d29c9a7395f4ed3b9f6a51b9b16a186.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a0d3bf25dd049388d06aee2dfef8673.pdf
    • https://static.usrfiles.com/ugd/ee6770_b51ace729b1b483f8f4fb1449467a91d.pdf
    • https://static.usrfiles.com/ugd/6df952_7ec35605893247e2973662836a3a48ef.pdf
    • https://static.usrfiles.com/ugd/b8c837_72020fa966ed421cae4e09872c55cac4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9ff37e4a526f42fd805e670bfd6c74ac.pdf
    • https://static.usrfiles.com/ugd/b8c837_9096d5bc6f8d4641a47c47d913564d34.pdf
    • https://static.usrfiles.com/ugd/834936_de38e935fe2b4007b7aca1b1477c1b5a.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000495f.bin
f9f786b534cb537e0504a41d8c35fb72cf4df0bb8f1b420180ab9255fbb7cfc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x495F 5380 bytes
font_01_sfnt_off00005ba1.bin
099490e741cb382b75b44b55af321012401e4e8fd385d3440d85d3e9c74d4907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA1 10212 bytes

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