Malicious PDF — malware analysis report

Static analysis result for SHA-256 402b37c4849ef213…

MALICIOUS

PDF

47.2 KB Created: 2020-08-29 20:13:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7d7dd42ecf07de42b194cce0a71a5f11 SHA-1: 8e38c393d8bfba56692e47f15ee214b7bd0b4015 SHA-256: 402b37c4849ef213f872de5d1120c91152170fa367a31ddf09269a5cb7894fa3
202 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.ru, which is disguised with a "cashback movie download" theme. This suggests a phishing or social engineering attack aimed at directing users to malicious content. The presence of a large number of external PDF links, many pointing to benign Shopify domains, indicates a potential SEO poisoning or link farm tactic to obscure the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cashback+movie+download+mp4 In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f0bbb218a3344a518b3ca18c344ff1bf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_67e202df558441b9b48a5e8b9e5731da.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a84e7df5727f4f7096af69625a29be4f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_1a04c1735e534a769bc333a6f7d715d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_a55c3657c1c346ceb08a8fe36e0100b7.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/7528/0552/files/r_t_nagar_full_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2820/0096/files/94333644813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2093/4558/files/altiplano_game_rules.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6789/0069/files/academic_information_management_system_aims.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/1833/3858/files/literature_review_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7185/6026/files/understanding_video_games_the_essential_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/faditalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/dyson_dc07_parts_diagram.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 5568 bytes
SHA-256: 4be05d8b298214fa60cc9e2fb926b5f0d796ed98b209310e44735a6ed2c5da95
font_01_sfnt_off00007687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7687 10364 bytes
SHA-256: 591cbbd38216d155d0d12ac7ea50698fa8bf3e2b6b0974e66f6ac82794d2848d
font_02_sfnt_off00009a38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A38 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c