Malicious PDF — malware analysis report

Static analysis result for SHA-256 85c1d247d6167875…

MALICIOUS

PDF

47.2 KB Created: 2020-08-15 02:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: edd9c651ac812a9a17e6e5ff94c679f9 SHA-1: 95795d3b2ac2443ca16b936ec6748d6210440a72 SHA-256: 85c1d247d6167875000945b93f9fcdd5c9e6ca199f0fe73a29359cce5f78f82d
202 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains a URL that mirrors the redirector's target keyword, suggesting a phishing or scam lure. The presence of a 'download button' heuristic further supports the interpretation of a deceptive download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=adansonia+digitata+medicinal+uses+pdf In PDF document text
    • http://files.alphaphiomega-betatheta.com/uploads/1/3/1/3/131398010/5311409.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/1/0431/5011/4978/files/boniwexusuxatavumaduwov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8737/1171/files/9637260930.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3908/8027/files/49481632595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4852/5206/files/94993420668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8993/5002/files/assumptions_of_law_of_demand.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/95428655221.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/4852/2143/files/16702095227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/ascites_approach.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7482/2044/files/power_amplifier_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/93465028975.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 2

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_off0000796d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 5368 bytes
SHA-256: 33b5bee666d56620f439200aba320812a00f995fd303dc59b15ff561724b5dff
font_01_sfnt_off00008ba9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BA9 11256 bytes
SHA-256: 9e92a8ef63a0b04ddb0b63b5db31f11799c4e3a8b7e27d27b1d1a2a0a554b81d

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