Malicious PDF — malware analysis report

Static analysis result for SHA-256 ceb0dd26b97e7047…

MALICIOUS

PDF

40.3 KB Created: 2020-08-21 06:55:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bdcf09b9582215e603e31ee84ab3edcf SHA-1: a30259ae4b8d5fcab88e1ed2b228e826e0ac35e7 SHA-256: ceb0dd26b97e704725db4ff25c7e12609b42037686f7192b6081803fb5392073
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of a link farm further suggests an attempt to distribute malicious content or SEO poisoning. No scripts were extracted from this sample.

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.cc/pify?keyword=cossacks+game+for+mac+free In PDF document text
    • http://files.queensboyzexplorers.com/uploads/1/3/1/3/131378816/7350eb.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/1/0438/5390/6080/files/53239179489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/diagnostic_laparoscopy_operative_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9838/3260/files/69353785891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9932/3558/files/makewanewexubopijadezol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2371/8824/files/what_is_apartheid_in_south_africa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3507/files/88260158229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1005/4554/files/game_android_apk_mod_offline_rpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3237/1622/files/giwebegukifev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0061/7381/files/66466271908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5692/2777/files/34541384334.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4939/4080/files/nudigukivogabufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/2615/3371/files/xililuvasosemimo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1112/1057/files/84432049417.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 3

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_off00005fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCB 5136 bytes
SHA-256: 2c5824a617c4a0c079c9a13ac974ccccaf02864f66498f21982ce4cc9b0f1cc0
font_01_sfnt_off00007136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7136 10284 bytes
SHA-256: 5da922f3ab99303be5403f9287a48334c01972d96273de701dbc07ea23186f66

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