Malicious PDF — malware analysis report

Static analysis result for SHA-256 d377cfa0717ea6e9…

MALICIOUS

PDF

41.3 KB Created: 2020-08-31 11:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29ba26ed18347c9ab2adc1ae67e323e6 SHA-1: 1884fb97ed471822385ca5dada55677ad3a954a2 SHA-256: d377cfa0717ea6e9c741a03a910d4c3df83a1a2ae4b6c5d8faeeeae94abcda5c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.club, which is likely intended to lure the user to a malicious website. The document body, though heavily obfuscated, contains text related to 'high tech health circulation booster pads' and the malicious URL, suggesting a scam or phishing lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources, further supporting the malicious redirection pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.club/wix?keyword=high+tech+health+circulation+booster+pads
    • https://static.usrfiles.com/ugd/72b0e7_936a4433de9a4b81a1d40692c0294b28.pdf
    • https://static.usrfiles.com/ugd/87a178_b500d9765ec1405bbf90a8a0ddfbb6e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_f03054af6d0643b48543cb0a14d3a541.pdf
    • https://cdn.shopify.com/s/files/1/0428/7312/7079/files/28866095046.pdf
    • https://cdn.shopify.com/s/files/1/0437/5222/6974/files/adobe_acrobat_9_pro_extended.pdf
    • https://static.usrfiles.com/ugd/b8c837_96ae42056e82436bb8ae0dacb5c22096.pdf
    • https://static.usrfiles.com/ugd/b8c837_4beb8039afed4e47a032263a46b8e020.pdf
    • https://static.usrfiles.com/ugd/b8c837_71f729a6cd084929a663a34438542b81.pdf
    • https://static.usrfiles.com/ugd/4ae4db_c187e67ee434482faf6de4ccd6d1f48f.pdf
    • https://static.usrfiles.com/ugd/0f5b72_b8af620982194c78bac98316f1c5b340.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000624f.bin
b897077fcf9d6ae9f0c7f59cc0a8867097f83a493bb11858c90bf6897bbed9d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x624F 5436 bytes
font_01_sfnt_off000074b7.bin
038f02655d17d6dcdd7d55445c48ec61d1752e300bb5fc8bb064365d29f46378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B7 10652 bytes

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