Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d85c3e563ec8cb3…

MALICIOUS

PDF

105.3 KB Created: 2020-08-30 12:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbe637baa0b9bac3a7289225ad8cfa96 SHA-1: f1f8bc4ed0d806552c2a884b25030468abc6b938 SHA-256: 6d85c3e563ec8cb342ced0074a4f5fd395288e0a117257778292d1803b296941
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector infrastructure at 'https://ttraff.ru/wix?keyword=how+many+hsv+gts+were+made'. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to direct users to malicious content. The presence of numerous external PDF links, many hosted on Shopify, further indicates a link farm or SEO manipulation tactic to distribute malicious content.

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=how+many+hsv+gts+were+made
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/6539/3820/files/pataz.pdf
    • https://cdn.shopify.com/s/files/1/0433/2571/8678/files/povagijazoxarulu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5960/1830/files/zolej.pdf
    • https://cdn.shopify.com/s/files/1/0464/7200/3734/files/66055296692.pdf
    • https://cdn.shopify.com/s/files/1/0462/4433/1680/files/ryobi_rts10g_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/4184/0552/files/73198469505.pdf
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/36181909336.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/angels_and_demons_tv_guide.pdf
    • https://static.usrfiles.com/ugd/b8bbd7_c1695cd5219f4c288a447d8437444d24.pdf
    • https://static.usrfiles.com/ugd/5ed537_9d954e1aa1734434b8ad15f52a6340d0.pdf
    • https://cdn.shopify.com/s/files/1/0432/0470/6464/files/66841992051.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/sejifekolamavilid.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d23.bin
c428b41611d0e5a450bcf4c6d857eae5a64a7b5a7471fbd84c4a65962b23e3ab
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D23 5424 bytes
font_01_sfnt_off00014f72.bin
8c19f9346556dd2f5ff5d59e992dda25f03bd8dea139dbcddd9e78f6f0c841e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14F72 16456 bytes
font_02_sfnt_off0001830a.bin
b10e7a0583bf6b216a5471aeed10f14210f1dda3adb60ac5169fcb38ba12e60c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1830A 16060 bytes