Malicious PDF — malware analysis report

Static analysis result for SHA-256 6178df312e791b00…

MALICIOUS

PDF

42.8 KB Created: 2020-08-09 19:34:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1d4e6133274fe321e566c77d97f35d9 SHA-1: 3f5fe6b615a68f9dfc57ff4536aead002ac61d7e SHA-256: 6178df312e791b00bb751111271d763f398072ec1d46724d0dc4a13c42815b53
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to a lab report. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent. The presence of numerous external PDF links also suggests a link farm or SEO manipulation tactic.

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=buckling+test+of+slender+columns+lab+report+pdf In PDF document text
    • http://files.apcbcp.com/uploads/1/3/0/9/130969389/dukumubujez.pdfIn PDF document text
    • http://files.cathyduncanart.com/uploads/1/3/0/7/130740011/5941903.pdfIn PDF document text
    • http://files.niznikconstructionservice.com/uploads/1/3/1/3/131381605/lobusitomominopekadi.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/1/0431/7498/5885/files/analytical_chemistry_of_foods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6146/0644/files/totetoxakipojilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4845/1739/files/zedezojasuxivalinodegemuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5279/2982/files/5343839194.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2933/1100/files/jabudiwaromosid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/veneer_door_design_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4232/4125/files/178766864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/jilopupave.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2917/6232/files/26734669079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8659/3694/files/jesizesopevomefik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0991/2477/files/zamipagam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0311/5682/files/acta_constitutiva_srl_mexico.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 1

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_off0000685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x685A 5728 bytes
SHA-256: 620e3e56c436f0c0324ce3584a2088d05720e0e8863f72e2c45c53e8635323d4
font_01_sfnt_off00007bc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC3 9852 bytes
SHA-256: efabfbbde7978e76db801b2ce845c18f8ca75d28877952478e3dd225ae871644

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