Malicious PDF — malware analysis report

Static analysis result for SHA-256 da40bd2bc1de24fb…

MALICIOUS

PDF

46.7 KB Created: 2020-09-01 04:38:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77e672f9f15ebecf3ba393f2bb50fcce SHA-1: 99b1f6af9c601d7f4cf173a63bae6f05db2e1bfc SHA-256: da40bd2bc1de24fb0369d5a50ea07e18d7f3220f51f0cbdea0a8b39e4ed2d50a
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary malicious URL being https://ttraff.ru/wix?keyword=bully+scholarship+edition+mods. The document body is heavily obfuscated and contains embedded URLs, further supporting the malicious intent. No scripts were extracted from this sample.

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.ru/wix?keyword=bully+scholarship+edition+mods In 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/1/0433/6179/6248/files/38849268314.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/13334934947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1334/9273/files/menugisori.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1e4819_e91dd736d5c04bd3bd270f9619c29c96.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc03df_b75d9c998ebb4514a10cb53136fd3fea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/65b209_386fd0393b774d308bb972bb2dd9b076.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_59faa54f4929421b8ef1af17bd4c860f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_31facdb28ae3470c841cfb5e3d84d451.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6229/files/mabutuzazutedefogi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1856/6306/files/kopista_bartleby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/32455629069.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8658/3710/files/data_mining_software.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_96d04563b91e43d4904875a785eaa00c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/db1da1_2be999f8b05d46d7b4435c2eb3c97440.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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_off000061d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D0 5464 bytes
SHA-256: 1bd72c71b0213a211be84e3dcbf4ef9944647c50a1ecd361e95aca7f87cc1486
font_01_sfnt_off00007449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7449 10384 bytes
SHA-256: 7a19a9d5d93c7864c833ac1ae7b22cf4c4e2062ebc635c242667d92ce4687c56
font_02_sfnt_off00009809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9809 16332 bytes
SHA-256: 69d723212eb6dd1954cef9b4649bd4df6eb17a6f495b2db8137d34beed6776af

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