Malicious PDF — malware analysis report

Static analysis result for SHA-256 90dfff9a5e614e3e…

MALICIOUS

PDF

41.0 KB Created: 2020-08-10 03:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c6fc45a1827573475fcff98521d0131 SHA-1: c4505d651e0018259754886b3d5875d8e427303a SHA-256: 90dfff9a5e614e3edb479b2d2452312afc87a2e3cee510833f798a1fbdae1748
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm designed to appear as legitimate content, such as "ankle sprain home exercises pdf", but the primary link redirects to the malicious domain ttraff.ru. This indicates a social engineering tactic to drive traffic to malicious infrastructure. The ML classifier strongly supports the malicious verdict.

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=ankle+sprain+home+exercises+pdf In PDF document text
    • http://files.bensoncourtyardtownhomes.com/uploads/1/3/1/4/131408172/zuxuserobetetu.pdfIn PDF document text
    • http://xaxex.mylaurabelle.com/uploads/1/3/0/8/130874359/f4ed5c514d.pdfIn PDF document text
    • http://jekimafib.lindsaysilva.com/uploads/1/3/2/6/132682883/saxoporejoparovo.pdfIn PDF document text
    • http://files.amandaaiken.com/uploads/1/3/2/7/132741194/e2bdcd2.pdfIn PDF document text
    • http://xovefim.thebravehouse.com/uploads/1/3/1/4/131407005/42962edc578b724.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/1/0429/7264/3491/files/minecraft_strip_mining.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7496/1059/files/digital_photography_complete_course_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9010/8833/files/54922456687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5959/0806/files/95649582969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0494/4807/files/60683907913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6820/files/72381429952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0470/7491/files/33282385226.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8014/6343/files/tesezusuweta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/15981754965.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 2

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_off0000611a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x611A 5516 bytes
SHA-256: 7c2db120ab787c3fdb35bff2b1a384e769c39a6d15d0c4f27ea33071324b4176
font_01_sfnt_off000073b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73B8 10416 bytes
SHA-256: 6ed4781ed4281a92e652ba50f58e897e4578a9dc637ca437d17fb0eed4a3f120

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