Malicious PDF — malware analysis report

Static analysis result for SHA-256 f91986271a874043…

MALICIOUS

PDF

45.0 KB Created: 2020-08-22 10:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9d116bf2ab990ba4f423974879f9f949 SHA-1: 11f52923217b2b126dc50a31f8fba0329049a8ae SHA-256: f91986271a8740437bfd6b2abe3dea76e734091bf9f0b086ce871ce2653ae013
194 Risk Score

Malware Insights

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

The PDF contains a deceptive title "Air force afi enlisted performance report" and numerous embedded links. One critical heuristic firing indicates a malicious redirector link to "https://ttraff.cc/pify?keyword=air+force+afi+enlisted+performance+report", suggesting the document is designed to lead users to malicious sites. Another heuristic identified a large number of external PDF links, likely part of a link farm to manipulate search engine results or distribute further malicious content.

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=air+force+afi+enlisted+performance+report In PDF document text
    • http://vupegoj.apexrejuvenation.ca/uploads/1/3/1/6/131607163/45fab.pdfIn PDF document text
    • http://files.crossfit-galveston.com/uploads/1/3/1/8/131872238/xogururu.pdfIn PDF document text
    • http://lapigugep.gandecollective.com/uploads/1/3/2/6/132681333/nokexip.pdfIn PDF document text
    • http://files.olgaflamenco.com/uploads/1/3/1/3/131398598/runegitesixob-xawidubeju.pdfIn PDF document text
    • http://letujeli.4rtomorrow.org/uploads/1/3/2/7/132741029/aaef1d1759fc.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/1/0428/0070/9791/files/voraludiguzegopopexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/resuzo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6950/4662/files/86425860862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9938/1146/files/canaanites_history.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bixebor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3142/8248/files/83053959547.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5665/1669/files/powasibefudedimawesijudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/71071690197.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_off000072e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E4 5288 bytes
SHA-256: 10e551733dcebcf1417ee2f6b6ddf71d9811b5d382bbf3ba6a1b879ed5fe9a64
font_01_sfnt_off000084bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BC 10088 bytes
SHA-256: aaf228e84a8424312ff252cad281cbd16c769d7d3d8e4e55d032f9369aaad693

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