Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b1a70e7556c8228…

MALICIOUS

PDF

41.2 KB Created: 2020-08-25 21:20:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 341ee6fddaec1200dc8176e4f7fa38d8 SHA-1: ba2667d1496e4541273c510fa3ccda7049a42f8f SHA-256: 2b1a70e7556c8228166ab2b134f3208b45b631d55deba7790246b7dd8ce4d886
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine visibility for the malicious content. No scripts were extracted, and the PDF structure itself did not reveal further malicious behavior beyond the embedded links.

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/pify?keyword=factorio+how+to+find+oil
    • http://files.colordoor.org/uploads/1/3/1/8/131856065/saneluwonenovogoze.pdf
    • http://sogufin.fatdogsoapworks.com/uploads/1/3/2/8/132815176/ce50d.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/34932249427.pdf
    • https://cdn.shopify.com/s/files/1/0429/0219/2284/files/concerning_hobbits_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/8129/3221/files/47279741240.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/the_armour_of_god_priscilla_shirer.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/xefemifodegav.pdf
    • https://cdn.shopify.com/s/files/1/0431/3117/5063/files/91441585546.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1284/files/zemopibopaxozok.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_off00006343.bin
a8ceb541e25b245e745b8e2c4827b11e16ff43aa1171127d5828458c3a984c75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6343 4980 bytes
font_01_sfnt_off00007435.bin
7ace205c9fb5a95b4523f3c030231de988eed2a65612dc74424661f44e74ebe3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7435 10524 bytes

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