Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a0212d14d2581c…

MALICIOUS

PDF

44.3 KB Created: 2020-08-31 05:46:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 332725c7b1ffc14b60810498e9bf62db SHA-1: ac9db314f58d5a27831ceafe50c534642017786f SHA-256: 08a0212d14d2581c228c69a5d896a1ea8671e9bb978e63f652340f35d6b6f640
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure, specifically 'ttraff.ru'. It also exhibits a PDF link farm behavior, embedding numerous links to other PDFs hosted on Shopify. The document body contains the malicious URL and references to other PDF files, suggesting an attempt to lure users to malicious content through a deceptive link farm. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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.ru/wix?keyword=crosby+saddle+serial+numbers
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9839/1196/files/tatuzenowaxudiz.pdf
    • https://cdn.shopify.com/s/files/1/0433/3659/7654/files/pawebupaluv.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/98700367402.pdf
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/22863467287.pdf
    • https://cdn.shopify.com/s/files/1/0431/4991/8374/files/20822195381.pdf
    • https://static.usrfiles.com/ugd/b8c837_89d5308107374ac8927f28b604a1b444.pdf
    • https://static.usrfiles.com/ugd/253000_c4634cab2de04011a65fd12a88c81b34.pdf
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/ruduzaxuxasogex.pdf
    • https://cdn.shopify.com/s/files/1/0429/5668/5468/files/30884588603.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce0eb75b390749449b9ce8ebc3cee67d.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_f15c62595b164ead8ddda7a073c442bd.pdf
    • https://static.usrfiles.com/ugd/61b8bf_b24afd48dd334b3b9010bc0e81ed79bf.pdf
    • https://static.usrfiles.com/ugd/f0f215_d1970be1514a4903beaa50387aa32d82.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006174.bin
f0ac564a3c917ef3a649e8f4fb1d94b712f10599ba9cd5e48092436c90771b8c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6174 5040 bytes
font_01_sfnt_off00007272.bin
3ddc350ab1fa55c937649743805ebe6bd7da92b23529e271497c1171898b7e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7272 10608 bytes
font_02_sfnt_off000096bd.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x96BD 4324 bytes

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