Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2bb5de797a129e…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 02:39:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ab4f5e0ab3aeb702f8579fc0e7455a70 SHA-1: 0928042a206abd0b9e7679a190dfec22390c3c41 SHA-256: 5b2bb5de797a129e1ed8cb929bec6d775083e2470351d1c39b1683fbf7cfc3e2
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) that is flagged as malicious. The document body and heuristics indicate a "free download" lure, likely a phishing attempt to redirect users to malicious infrastructure. No scripts were extracted, but the embedded URLs and link farm structure are strong indicators of malicious intent.

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=connotation+and+denotation+lesson+plan+pdf In PDF document text
    • http://files.miscellaneoussushi.com/uploads/1/3/1/3/131398143/1708312.pdfIn PDF document text
    • http://files.jacobveritas.com/uploads/1/3/2/6/132683334/bdf7ced5ec6f79.pdfIn PDF document text
    • http://files.melipeterson.com/uploads/1/3/2/6/132682110/1272670.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/1/0431/3330/4981/files/vikajafezeje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/ferelorubugimobuxamekeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1918/7862/files/firefox_auto_refresher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1070/9915/files/77934997136.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1988/7001/files/38549573149.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5752/1574/files/zitawoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/13058563075.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9307/1774/files/15454923291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/muzoguganava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6022/3397/files/character_sheet_5e_dnd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/bokujutewizevisimote.pdfIn PDF document text
    • http://www.readwritethink.org/classroom-resources/lesson-plans/what-revising-connotation-80.htmlIn 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 7

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_off000064a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A8 4844 bytes
SHA-256: b7f1fdb134c3f7a4b64583164299feef99adf00eb65efdd3f3ff30f523bc4005
font_01_sfnt_off00007535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7535 10288 bytes
SHA-256: 7b4dd6667b75974e94aae46f940bad57307c4a648106bc190de8d1fa41b7e802

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