Malicious PDF — malware analysis report

Static analysis result for SHA-256 337199ae8d8f520d…

MALICIOUS

PDF

43.5 KB Created: 2020-08-18 14:40:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b64dae47f4cc3f6c1d570dd8b8cc71d5 SHA-1: eaf200fcc78661b7b249f590feafd6f0478e9520 SHA-256: 337199ae8d8f520da349d029ca2f9d013df5ac8e4bb86bbde12b2f589b4e1253
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a significant number of embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=mendelian+genetics+lab+answer+key', which is likely used to redirect users to a malicious site or download further malware. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The presence of numerous other PDF links suggests a link farm or SEO poisoning tactic to distribute the malicious 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.com/pify?keyword=mendelian+genetics+lab+answer+key In PDF document text
    • http://rinerib.capeagents.com/uploads/1/3/0/8/130814328/5002268.pdfIn PDF document text
    • http://files.creekviewvolleyball.com/uploads/1/3/1/8/131856039/9693390.pdfIn PDF document text
    • http://files.russellflea.ca/uploads/1/3/1/0/131070112/bukul.pdfIn PDF document text
    • http://files.alexblassingame.com/uploads/1/3/1/4/131482968/wijadagexe-wotiribi.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/1/0428/2603/9452/files/nemoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0685/9176/files/20750140832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/47983765431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4749/4567/files/vavugalinojovesukowur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/sunomuwebezuvekunofaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/sparkle_your_name_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1655/2605/files/durapufezadi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7015/2088/files/smapi_console_commands.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1222/6206/files/84710996271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5064/7204/files/77664804742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/siwizobudavegi.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 5

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_off000068c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68C7 5508 bytes
SHA-256: e646ca61fbe6b43e3bf6292fa8295a8a0bd1d8d9654e20ebd548aec874025700
font_01_sfnt_off00007bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB0 11084 bytes
SHA-256: 6a7440b5ed524e0c28dcb1d6c48aa4f6e0945381dff0d8db2a6e5d85d44f510d

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