Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2944a258f54ed40…

MALICIOUS

PDF

46.9 KB Created: 2020-07-31 01:57:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1e54e76d8b4bb7195701e9ae871763f SHA-1: 60b607fcc6619d6907cf69255ed7b3b419f76f34 SHA-256: c2944a258f54ed40c3b9c5880f612b99f8231c29d1a29c66d9679ca32013821f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary links points to a known malicious redirector. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, often used to create fake documents for phishing or malware delivery. The presence of a malicious redirector URL is the highest priority IOC.

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=thomas+calculus+11th+edition+full+book+pdf In PDF document text
    • http://files.lauramernoff.com/uploads/1/3/0/7/130775654/3cdc9bb88a09.pdfIn PDF document text
    • http://files.heatherwarren-crow.com/uploads/1/3/1/8/131871439/3bb44423ced.pdfIn PDF document text
    • http://files.reactextechnology.com/uploads/1/3/0/9/130969915/aaac0f60f1fe498.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/1/0431/0705/7825/files/99173146577.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2672/6568/files/466115158.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2089/files/farokufewatusuvaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/puzufobiboguruferulegada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/6827277623.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/kilipuberozalijadunalox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/mejige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9171/2405/files/pedevigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/90454960164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kusamusa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dutevitijenunolekegek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4141/5580/files/96943286865.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_off000078b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78B9 5384 bytes
SHA-256: 0423e28b16f30095a12037936891d1b8e9f167cea8b5d28a330edb6089da4c61
font_01_sfnt_off00008ae2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AE2 10408 bytes
SHA-256: cef89a42e888d4567de90c7452ad9802893e280f368945535cab1f1a198734cc

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