Malicious PDF — malware analysis report

Static analysis result for SHA-256 031dbfc84aae9c79…

MALICIOUS

PDF

51.0 KB Created: 2020-07-29 12:14:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c204db1ead172d1765b42522ff509647 SHA-1: 2cc43846914e755d95c0218fd2b16b2da4dd1c18 SHA-256: 031dbfc84aae9c797bbeacc2d4be7fe1d8fdf7aa7e40525d1f3b3ca26179b5e7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure associated with malicious activity, specifically a "free-download phishing" lure. The document body, though heavily obfuscated, suggests a deceptive pretext related to 'minority group definition pdf'. The ML classifier strongly indicates maliciousness, and the presence of redirector links points towards a phishing or malware distribution scheme.

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=minority+group+definition+pdf In PDF document text
    • http://files.alexferguson.co/uploads/1/3/1/4/131453429/vefas.pdfIn PDF document text
    • http://files.myinternationalfamily.com/uploads/1/3/0/8/130814129/vukururigu_sofalupisif_wakebowufazupe.pdfIn PDF document text
    • http://files.terriermath.com/uploads/1/3/0/8/130813821/ferotumufagu.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/1/0432/6726/0582/files/32853164219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4393/7690/files/tiwal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0366/5822/files/kitikitaneloziba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/zaserinotupijutulo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/43137995938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/89787187315.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/kazubuwetibux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/21445422629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/nomiwebivolidamakiserav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8153/0534/files/sadut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0961/3725/files/legepuxerijisube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3765/5193/files/252422327.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1442/9608/files/nunurazageg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8072/8224/files/ropejozuxokab.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_off00008c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C88 4776 bytes
SHA-256: 5a584f4a97ec041bc4222e8adbe76b52d7365ef8b8eaee7cf3e399970169cecd
font_01_sfnt_off00009ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE8 9992 bytes
SHA-256: cdfe3c97ff2f73899b434e25d9ed7b944cfca0dfb59e5e94622fbc6006c59717

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