Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc76b92cfca34b3…

MALICIOUS

PDF

42.9 KB Created: 2020-08-21 08:18:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ad4852ced762fde23ac74500f76e56a4 SHA-1: f6bad638d572f685e36a60b24c31aee0802f073e SHA-256: 7cc76b92cfca34b391ee99eff8157fc5b7ace2776c27df147700a88b883ef60e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains the primary redirector URL, suggesting an attempt to lead users to a malicious site. The presence of a large number of external PDF links further supports the SEO link farm and redirector lure, typical of phishing or malware distribution campaigns.

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=define+formal+antonym In PDF document text
    • http://tazodapi.prolyticsconsulting.com/uploads/1/3/1/8/131856703/digule.pdfIn PDF document text
    • http://files.caseworkproductions.com/uploads/1/3/2/6/132681985/d329a38b55.pdfIn PDF document text
    • http://nuvajuzet.superiorsalesdist.com/uploads/1/3/1/3/131380126/69ebfc772e4.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/1/0431/3461/5708/files/boating_safety_guide_transport_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4414/2245/files/pejotawigebasevav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/zotowamofapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6987/5111/files/31517143507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/celebrations_around_the_world_reading_comprehension.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/lulitego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2906/0001/files/89315391722.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 4

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_off00005e5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5B 4624 bytes
SHA-256: 03e288a373a1bc57c398c7a67d446a8d41947d681d808cebcaa792b9e2709c4b
font_01_sfnt_off00006df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DF5 10396 bytes
SHA-256: 70bb1ab8320e4b7926aee2af8097833118c6b387cf0506161c67e8cf602ffe9e
font_02_sfnt_off00009174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9174 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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