Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ab5db9160d8fe6…

MALICIOUS

PDF

47.1 KB Created: 2020-08-08 11:08:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eb11fc5e1e4bd501e34155abd304cfb6 SHA-1: ced08ee8698c47d517ff80e52b63ecf100f0a2c7 SHA-256: 83ab5db9160d8fe68e26ccb4e8afbaa4abf521aa44264bbd342f145d04e8c7da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. This suggests a link farm or SEO poisoning tactic to trick users into downloading potentially malicious files. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=texture+and+structure+of+metamorphic+rocks+pdf In PDF document text
    • http://files.junctionworkshop.co.uk/uploads/1/3/0/7/130739987/9808266.pdfIn PDF document text
    • http://files.aplusacademic.net/uploads/1/3/1/3/131379594/jizez.pdfIn PDF document text
    • http://files.adamsmetaldetectorsonline.com/uploads/1/3/0/7/130776444/5771517.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/1/0450/8853/8776/files/arduino_uno_programming_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5679/9647/files/alexander_mcqueen_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/53204085645.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/4210461170.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/renamixoxapuperezerugi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9378/6791/files/pivifemabinasokofarejax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/86752049224.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62386903812.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4865/7318/files/24817081470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6596/6754/files/vomoradatozewitusavupam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8470/7992/files/capital_cities_of_the_world_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6871/8242/files/affixes_suffixes_and_prefixes.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 1

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_off00007c1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1C 5444 bytes
SHA-256: c33f7deae510df0dca51b449b1605baec150e5240d14f427ce464bc621f14b6d
font_01_sfnt_off00008e7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E7A 9704 bytes
SHA-256: aa9a79ff76b8bd34ddab173115f5ecc194d34e4df32551014a3913e0ba2c4034

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