Malicious PDF — malware analysis report

Static analysis result for SHA-256 73906eaf020bb377…

MALICIOUS

PDF

33.5 KB Created: 2020-08-10 03:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d6981ffe5f1c22280a5e5c7ef3aefb0 SHA-1: feb9d9056da12c6c44e540390e5b21dde0f7084d SHA-256: 73906eaf020bb37741f8a2caf505f5b8e789f2bbb337f101963f05efb07cf0e7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to redirectors, with the primary lure being a 'free book download'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM indicate that the document is designed to lead users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is part of a phishing or scam campaign.

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=cambridge+academic+english+book+pdf In PDF document text
    • http://files.aponysparadiseequinerescue.org/uploads/1/3/1/4/131438234/falul-lelonozunesa-sepulen.pdfIn PDF document text
    • http://vulewi.pauldingcountyogs.org/uploads/1/3/2/6/132682646/tatan-xotasasulokep-sonatipulaseg-dalupaj.pdfIn PDF document text
    • http://bosuw.danielleabrams.com/uploads/1/3/0/8/130814017/zutozufazomejiwez.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/1/0432/3803/1518/files/jogovomorizixujajipudite.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7628/7648/files/32071014994.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5083/5878/files/cestodos_morfologia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4768/2201/files/3851628229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4225/8587/files/11604316785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9213/0458/files/74307302423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/miwabenudevafefip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4016/files/dudix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1461/8262/files/jikafipisajerurukazej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6535/2102/files/vertical_farming_philippines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0844/0995/files/werajurab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5859/2921/files/15964041190.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_off000046bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46BC 5680 bytes
SHA-256: 6c2a718d8c692628a45e540c1afd7ff6cc085afa40eea06692f4857b52279068
font_01_sfnt_off000059d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59D4 9264 bytes
SHA-256: 517237635349b2ad778bb1310154ce69f8beaf27d935b5277a9aa3f7f0eeeedf

Open this report in the interactive analyzer, or submit your own file for analysis.