Malicious PDF — malware analysis report

Static analysis result for SHA-256 6424bd2f96eb3937…

MALICIOUS

PDF

44.7 KB Created: 2020-07-29 23:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 752457501b3422c6261fdaa6bcc14a2a SHA-1: c8e870506cbfa55803dd1f0d211ac3eabce2d64d SHA-256: 6424bd2f96eb3937cab62aeb60e3529c3d1a6289a1408502d417bbeeaa2a08a6
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to a redirector service (ttraff.com) which is flagged as malicious. The document appears to be part of an SEO link farm, attempting to lure users with a fake 'free download' lure. The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack. No scripts were extracted, and the document body was heavily obfuscated.

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=clinical+anatomy+made+ridiculously+simple+4th+edition+pdf In PDF document text
    • http://files.laws.cassadaganewyork.org/uploads/1/3/1/3/131379325/3b7a3350d56742b.pdfIn PDF document text
    • http://files.ouranosmarkettiming.com/uploads/1/3/1/4/131408954/ab02c8a8c162622.pdfIn PDF document text
    • http://files.novapublishers.net/uploads/1/3/1/8/131857117/13033d9a.pdfIn PDF document text
    • http://files.remodelcostspreadsheet.com/uploads/1/3/1/6/131606453/zobonifarevufa_fafelidenamo_tikoto_kodaperevi.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/1/0433/4059/5355/files/70494854703.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/46248539743.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2180/2404/files/86326686931.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/28105279273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/gowivo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52733892229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1218/4474/files/roponuwobujoruzupijera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/fidokanuvotivimefenaviwod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6778/5884/files/wafepe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/batavitujub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6717/1223/files/27898501670.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4709/9287/files/73176512931.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 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006456.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6456 5488 bytes
SHA-256: 5fdbdb692602882f56b2f860a4b53ea236923fa1c113a72ac8290731ff35fe4c
font_01_sfnt_off000076ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76CE 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00007f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F5B 10400 bytes
SHA-256: 30cc3544c1a09f9693ae5ee0e5d5476b20daabe8db82f3f49d054ccf1e6e5778

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