Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33ffdaee17f6858…

MALICIOUS

PDF

42.5 KB Created: 2020-08-08 01:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 741caab3f7901013a8cd8599245a3eee SHA-1: 71a497138ee8957533ac22b5c0f3624a2182ec35 SHA-256: a33ffdaee17f6858ea812c3e1ca10f24342586861b55d36d8dbaca6d2c3cd53c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a link to a known malicious redirector, ttraff.cc, disguised as a carburetor parts identification worksheet. The document body, though heavily obfuscated, contains the same lure text and the malicious URL. The PDF also hosts a large number of external links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious content.

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.cc/wb?keyword=carburetor%20parts%20identification%20worksheet In PDF document text
    • http://files.gotmygoat.com/uploads/1/3/0/8/130814717/vakolivofenoxuzef.pdfIn PDF document text
    • http://files.cornishluxuryretreat.co.uk/uploads/1/3/1/8/131856772/kupawades.pdfIn PDF document text
    • http://files.firstcovenantsuperior.org/uploads/1/3/1/6/131636903/867872.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/1/0432/1024/4256/files/96582614811.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/floats_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2212/1122/files/zaxov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9573/6988/files/fewomazirixisusage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4680/files/veromuzejatenitato.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3945/7429/files/jozutid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1448/7190/files/ponipofajoposaluseletufaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/87134814777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4892/7386/files/12795244763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7354/5116/files/philips_universal_remote_manual.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_off000068b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 5412 bytes
SHA-256: 2c83dea587758a43738c407de977f94e066c6f18ceee6f74f622b1734ae6fb09
font_01_sfnt_off00007b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B24 9860 bytes
SHA-256: b6460d47ab0328c6d0c13f03cb802c78e8bdca80b50bdf52de97ed47b368f16d

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