Malicious PDF — malware analysis report

Static analysis result for SHA-256 26231e4b0d8117ad…

MALICIOUS

PDF

42.2 KB Created: 2020-08-20 18:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 13967bd49d9082eedd7f5117bbb7c57f SHA-1: cd90c54b63bd61db811000162f0fdc22c6a16173 SHA-256: 26231e4b0d8117ad74cc1a17f1c483200a5d48e380f89abb9c18242955c24eb9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a 'crocodile tears rs3 quest guide'. This indicates a social engineering lure to trick the user into visiting a malicious site. The PDF also contains a large number of external links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=crocodile+tears+rs3+quest+guide In PDF document text
    • http://files.mikesbrass.com/uploads/1/3/1/4/131437660/94d81d853a.pdfIn PDF document text
    • http://files.nctgrp.com/uploads/1/3/0/8/130814042/5640553.pdfIn PDF document text
    • http://files.vedajess.com/uploads/1/3/0/8/130813108/zagiwum_vukolonepezeje_nugipefubuzowu_pomafonipe.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/1/0432/4386/4228/files/14826379062.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8507/8434/files/anti_knockback_hack_1._8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7673/1558/files/japanese_food_guide_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/pebit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0255/2742/files/damodarastakam_lyrics_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4291/3955/files/bimotej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5081/8969/files/the_hunter_s_moon_or_melling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7595/9973/files/havana_alto_sax_sheet_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0454/5937/4230/files/hunter_douglas_powerview_installation_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5407/9904/files/23071746123.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/debubukedukagekurifup.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: mikesbrass.com 3 samples

Related samples 8

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_off000067c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C1 5304 bytes
SHA-256: 9a1dd6fe981c19690e27c28b164fbae6772e1523394dece3f0ae90e39263ea22
font_01_sfnt_off000079c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79C0 9956 bytes
SHA-256: 9dbb01d5a95c8986e7ac8b0bab8015bb1485dedda8a115446bb455f00a89a78e

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