Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ca4b7fbd953c54…

MALICIOUS

PDF

40.0 KB Created: 2020-08-23 19:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 545a92172dd52b32dc622707500df8d2 SHA-1: 616af4d2407635f721e5f4309c7704220c286fae SHA-256: 09ca4b7fbd953c5449d4b31127a2eea40509473c4abc2c9927b4f697e4dc47ef
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, ttraff.ru, which is likely used to obscure the final destination of the malicious content. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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=rule+based+classification+in+data+mining+pdf
    • http://files.christiandisciplefarm.com/uploads/1/3/0/8/130874647/884e9c2a8.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/7379/7284/files/86602234202.pdf
    • https://cdn.shopify.com/s/files/1/0432/4599/4146/files/trekz_air_manual.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/educational_research_quantitative_qualitative_and_mixed_approaches_6th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0430/5921/6537/files/bodumibivitisakofuwupud.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7418/files/10740857287.pdf
    • https://cdn.shopify.com/s/files/1/0433/3859/6510/files/91304367857.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/favubedezemopazejive.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6133/files/31677238011.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1649/files/wuzufi.pdf
    • https://cdn.shopify.com/s/files/1/0427/8213/0332/files/rekujisuzaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/46869078707.pdf
    • https://cdn.shopify.com/s/files/1/0447/9336/4637/files/figupimun.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_off00005c18.bin
6ab6505fe4be78c8b80024adac39eab335d0ad8fe56312013fdb377e43dfcc3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C18 5528 bytes
font_01_sfnt_off00006ec9.bin
6859e02177bc906a3f8b2625e6f694c049370cf8275e71cdef79dc50027a264d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EC9 10672 bytes