Malicious PDF — malware analysis report

Static analysis result for SHA-256 85f8e86598f63842…

MALICIOUS

PDF

42.8 KB Created: 2020-08-13 03:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0adaceeff6d81f5f8935df8dba07cf96 SHA-1: 28ef8866c6e8a4438b4d7f70e08fb7346bea3b1c SHA-256: 85f8e86598f6384266f083e99dc313afc9be6c64ab2aecd3798846cbc1798ef4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector infrastructure designed for SEO spam and phishing. The document body, though partially obfuscated, includes a URL that appears to be the primary lure, directing users to 'ttraff.ru' with a keyword related to a veterinary topic. This suggests a phishing or scam attempt, likely using the PDF as an attachment in a spearphishing 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.ru/wb?keyword=otitis%20por%20malassezia%20en%20perros%20pdf In PDF document text
    • http://ranetus.sirfa.co.uk/uploads/1/3/2/8/132814930/bifita-desirawew-velowoduw-wovofesi.pdfIn PDF document text
    • http://rasopax.southeasterntruckbody.com/uploads/1/3/1/4/131407068/gufofaxusaw.pdfIn PDF document text
    • http://files.choisnuts.com/uploads/1/3/1/3/131381640/bitopok.pdfIn PDF document text
    • http://files.cpi-plasma.com/uploads/1/3/2/7/132712116/dikanavowakomab.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/1/0436/9465/3595/files/walamive.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2920/8986/files/guvividimofugifuruja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6992/1690/files/jeveputukelopabijepesesij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/gudetujelosekusak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/bender_gestalt_test_interpretation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/carte_touristique_auvergne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9558/9013/files/90225904603.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0486/9277/files/wiser.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3490/1671/files/invalid_active_developer_path.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/tufelejajojuso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1969/6288/files/acidos_y_bases_organicos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/4287/6061/files/62108345948.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
🗂 Part of campaign: loriblaylock.com 6 samples

Related samples 4

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_off00006739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6739 5264 bytes
SHA-256: da8a00f352b89edba9abc2bf20af40a86ea09e7aea31841cf797ee889bc9647b
font_01_sfnt_off00007902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7902 10996 bytes
SHA-256: 3c6775353f32146ab739066b9126f69d5c98b628a802efc3a664065d69642c68

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