Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df64d86de59cc91…

MALICIOUS

PDF

39.8 KB Created: 2020-08-02 16:49:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b8b3c1ab8fa34afb9380221de1e4ce91 SHA-1: 8271def8697bc2777ad060340984fcea27689a3b SHA-256: 1df64d86de59cc919a9f84128bbf2cb6fdbd439de764592baeb21900cd31dc39
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large number of embedded links, suggesting a link farm or SEO manipulation tactic. The primary malicious URL identified is https://ttraff.ru/pify?keyword=css+box-+shadow. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=css+box-+shadow In PDF document text
    • http://files.discourse-x.com/uploads/1/3/0/8/130873876/2ee7f760bb0.pdfIn PDF document text
    • http://files.bloodsugarbikemagic.com/uploads/1/3/2/8/132814958/6480127.pdfIn PDF document text
    • http://files.armantherapy.com/uploads/1/3/2/7/132712057/kuzomowakapubomofok.pdfIn PDF document text
    • http://files.shreveportchamber.org/uploads/1/3/2/6/132681901/vekatilijojipefiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/dark_souls_2_hollowing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0158/5570/files/ribetivuzigolapopal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/fipifasukexazevixol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/5888658952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/11568380646.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8794/6133/files/34447714134.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0924/4316/files/how_many_emotes_per_sub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/18813115042.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/30796611073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zexula.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7466/files/97006934754.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/bilovapuvutusunixavebisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8767/6063/files/54537404108.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CD8 5020 bytes
SHA-256: 86ce94f2c9aba1a4fa31fd5b61627ddeaa3f72c25681d60162524026d6367752
font_01_sfnt_off00006dff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFF 10832 bytes
SHA-256: 76d18d57a9518bc02cf7befb26cfd25414ef73c93e29efe1421ebeb2702a0c68

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