Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1bc1bd2f10b8c9…

MALICIOUS

PDF

43.2 KB Created: 2020-08-04 13:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: be46161377243e25c5fcca52aa76a062 SHA-1: fadf5a7d6e06217716c6ad90fd3af92fd6437c6c SHA-256: 0a1bc1bd2f10b8c9cdf05f9a8e6e7484eef606e93e0a72575d060c16a3b934a5
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

The PDF contains numerous embedded links, many pointing to a redirector URL associated with malicious activity. The document body, though heavily obfuscated, contains the same redirector URL and appears to be part of an SEO link farm strategy. The ML classifier also strongly indicated maliciousness.

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=cancer+de+cuello+uterino+pdf+bolivia In PDF document text
    • http://bivasaf.villadelphini.com/uploads/1/3/2/7/132710779/303f024.pdfIn PDF document text
    • http://files.wolverinelacrosseclub.com/uploads/1/3/2/7/132712369/207951.pdfIn PDF document text
    • http://files.thecarluccishow.com/uploads/1/3/1/8/131856257/wezubutapexunab-vuxitegaponed-miwosapofukefoj-dokexekoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3304/2839/files/62011190697.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/10359407241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5817/5908/files/77667709715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4583/9271/files/autonomous_vehicles_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6823/5675/files/fedixuvovegefezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3876/0342/files/70329989940.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8721/6293/files/mesutegufesulefuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0791/7729/files/34945464334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4101/2382/files/92614762575.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4035/6005/files/fobinupetomoxiwodi.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 7

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000599a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x599A 5076 bytes
SHA-256: 33f6c82b37996355ccdd001a4e069fd7d02d58fc6ff6b276eb5c8a9a7f32038b
font_01_sfnt_off00006ae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE5 11728 bytes
SHA-256: 2a03d8b1b52ebffb67494aaaa65ffada83125583be2162ec95dea281662e9376
font_02_sfnt_off0000906a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x906A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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