Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c5d8fd480617e7c…

MALICIOUS

PDF

40.7 KB Created: 2020-09-29 09:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9850ccdf69965bb93d9ef7c21f77432c SHA-1: 1d37b63b177a2bf231a5a5d21188a40370fdf2a6 SHA-256: 0c5d8fd480617e7c2b2942e742bb02812905ddc92d24ab1284dfc2a14b4190cc
194 Risk Score

Malware Insights

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

The PDF contains numerous links designed to appear as academic resources, but they redirect to malicious infrastructure, specifically identified as a redirector at `https://ggtraff.ru/mozel`. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links are indicative of a social engineering attack.

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://ggtraff.ru/mozel?keyword=academic+reading+practice+pdf In PDF document text
    • https://site-1036644.mozfiles.com/files/1036644/pikamiretimefaduka.pdfIn PDF document text
    • https://site-1036862.mozfiles.com/files/1036862/24324790334.pdfIn PDF document text
    • https://site-1036679.mozfiles.com/files/1036679/89308256802.pdfIn PDF document text
    • https://site-1037238.mozfiles.com/files/1037238/52227505824.pdfIn PDF document text
    • http://files.diegojmurphy.com/uploads/1/3/1/6/131636834/mipad-pizerakosage.pdfIn PDF document text
    • http://files.missinginamericaproductions.net/uploads/1/3/1/3/131381067/b0f999.pdfIn PDF document text
    • http://files.franklin20.org/uploads/1/3/1/6/131607810/jujififa.pdfIn PDF document text
    • http://files.leadagency.org/uploads/1/3/2/6/132695663/wupove.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/1/0459/9323/0498/files/ramosugajebovisoxa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/posterior_circulation_stroke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/43381715455.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0265/8979/files/bezopigun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4741/4691/files/44191580445.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 5

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_off0000616f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616F 5256 bytes
SHA-256: 88a4bace53b9a8fb377020d2ab21c52802dba35347c55a94fbdc3e92a9522402
font_01_sfnt_off00007343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 10308 bytes
SHA-256: 8f0e3a2a90c5d41fe2fcc4c8e3c61b89cce4876eb30f9cc11c22f1fb7954ea5b

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