Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fba388dbf975bb7…

MALICIOUS

PDF

32.3 KB Created: 2020-08-13 13:01:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c9a06be7db764b9774a50d6c3b7eed5b SHA-1: 6fed4da88c6e7ed57c0e0b15a463a53bb4bf1a22 SHA-256: 6fba388dbf975bb75416f0b3cedb6ffe0da9324a9c923410b2442a62fc632a67
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is flagged as malicious. The document body, though heavily obfuscated, contains text related to a 'hotel housekeeping training manual' and the malicious URL, suggesting a phishing lure. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking users into clicking a malicious link disguised as a document.

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/wb?keyword=hotel%20housekeeping%20training%20manual%20pdf In PDF document text
    • http://kaweg.highlandtigers.com/uploads/1/3/0/9/130969723/7d1d742e9127c5b.pdfIn PDF document text
    • http://files.photographsbycarolmccullough.com/uploads/1/3/1/4/131452883/femeriwujo-vozukubupoba.pdfIn PDF document text
    • http://files.mrskramlsclass.com/uploads/1/3/2/7/132740281/xelufatifoz_nobotuwilagi_tilixunowifor_lifaki.pdfIn PDF document text
    • http://files.big-green-planet.com/uploads/1/3/1/0/131071256/7939165.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/1/0428/8276/0870/files/38071784502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lekutaxawiwasutoxojopelor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/52320532825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4431/4024/files/statistical_methods_for_data_analysis_in_particle_physics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5123/7022/files/bronchiectasis_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6278/0311/files/54866585514.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/lajokukabifizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9658/8967/files/muvesejopasoxisusosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/46677619227.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/tirevabuzosaviboli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8049/6792/files/palopubevizufutorin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2956/1495/files/les_maladies_cardiovasculaires_dfinition.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 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_off00004433.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4433 5480 bytes
SHA-256: bc244a128048c997b40bce201244488eb4f205942f9da301f79abf0b54153dac
font_01_sfnt_off000056a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56A1 8636 bytes
SHA-256: 58b76376b1d99679525e42e30f27f94e31d6cd51b097d1468795f0754552c7dd

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