Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf9a08ed9e40cd4…

MALICIOUS

PDF

41.4 KB Created: 2020-08-19 10:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d31aa15c18c256f00c0e584ee9ecdc14 SHA-1: c6e1c6f409a55213fe8c16069f577dfbf038edd3 SHA-256: 2bf9a08ed9e40cd40f3075d693b6ae35f53b637f0176c701547ea82c9348f1e9
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with the primary malicious link pointing to 'https://ttraff.ru/pify?keyword=apnealink+report+results'. This indicates a likely attempt to redirect users to malicious infrastructure, possibly for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=apnealink+report+results In PDF document text
    • http://tiwajaj.otterhounduniversity.com/uploads/1/3/2/7/132740720/dasam.pdfIn PDF document text
    • http://diber.okiobi.com/uploads/1/3/1/1/131164278/1321128.pdfIn PDF document text
    • http://files.jacksherrydpm.com/uploads/1/3/2/6/132695633/534d6d0.pdfIn PDF document text
    • http://wozigexog.therealisreal.com/uploads/1/3/1/4/131407057/xutefel.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/1/0436/4497/7305/files/deropa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2524/3039/files/begebujonexoxutubi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2437/6227/files/bytes_to_gb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9588/files/41540976126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7361/0663/files/16633517657.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/20330070597.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/83612890845.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7076/6750/files/joxoxonurojijataniwigob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6536/0034/files/bluebeard_story.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 6

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_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 4868 bytes
SHA-256: ea4d44528a92c18f56451fad370f9c217b217f26e3897a79ecb78b70fb6e3d3b
font_01_sfnt_off00007579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 10336 bytes
SHA-256: 30f762b6aea9481bb37b45f8a3dd17603d53fb83d49c6a0ccb6f265a0fa642ef

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