Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ac2f257cad1421…

MALICIOUS

PDF

58.8 KB Created: 2020-08-23 19:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 99b29ec676317d29300ba01794c1980b SHA-1: aa22859a9ab9b616ef2d4b56ad9ffc4f5e9690ee SHA-256: 76ac2f257cad1421eeea4319460078e8ef6f343ff16a3432d520f3c155258a38
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL points to a redirector that uses a keyword related to a medical topic, likely as a lure. While no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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.com/pify?keyword=spinal+av+malformation+classification In PDF document text
    • http://xeleke.sailabilitybatemansbay.com/uploads/1/3/2/6/132696067/e3894.pdfIn PDF document text
    • http://files.angels-of-the-road.com/uploads/1/3/1/8/131872079/pemiguzot.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/1/0433/1392/2206/files/41659198208.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7674/7413/files/vegojirodufigimame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7078/2614/files/netuxonifofozawuvazunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31903895201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4621/4564/files/artificial_neural_network_seminar_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2558/7610/files/35607372140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7237/3411/files/benign_paroxysmal_positional_vertigo_patient_handout.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7175/0823/files/71672517254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/aeryon_skyranger.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1917/2002/files/screen_capture_android_galaxy_tab_pro.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 8

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_off0000a8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8AB 5324 bytes
SHA-256: 9f18acbeb4f5b5ca2b1a57344f39d2836f695d518f73efb0f02f4dbe65b990bb
font_01_sfnt_off0000baac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAAC 10568 bytes
SHA-256: 1cc6fd758ff2b9c55218c1000f983c1d180ac9dc35f16eb2721813251369f494

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