Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01ffb69fbbc68cc…

MALICIOUS

PDF

40.7 KB Created: 2020-08-29 02:28:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c95822c294aacdb6e9a8d96ab25cdd93 SHA-1: d3d671c692b0f570b5191524c5dc2988430ab8f1 SHA-256: e01ffb69fbbc68cca38c403cabe00c3015eabd466a8d1fa5b6d8f9f7c832dee5
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, 'https://ttraff.ru/wix?keyword=cheat+gta+sa+ps2+langsung+tamat', is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains this URL and appears to be a lure for game-related content. The ML classifier strongly indicates maliciousness, and the PDF structure suggests a link farm designed to distribute malicious content.

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.ru/wix?keyword=cheat+gta+sa+ps2+langsung+tamat
    • https://cdn.shopify.com/s/files/1/0427/8448/9631/files/27825095943.pdf
    • https://cdn.shopify.com/s/files/1/0428/3580/4319/files/75819701613.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/best_hr_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/answers_lootpack_traduo.pdf
    • https://static.usrfiles.com/ugd/b8c837_36c78c968f154f5b879f84f6daa6a2bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_787b949d9dad4085b91f693a2a04744e.pdf
    • https://static.usrfiles.com/ugd/b8c837_35f541860a7a4d03b64aaf45e2b94f5f.pdf
    • https://static.usrfiles.com/ugd/b8c837_487fc394f08a44459ad4c0592f0a8814.pdf
    • https://static.usrfiles.com/ugd/b8c837_5ec583582eae49569bdf6e18df63502b.pdf
    • https://static.usrfiles.com/ugd/b8c837_460d0313e2ff4da7bcfcd08254136c0b.pdf
    • https://static.usrfiles.com/ugd/b8c837_3960b0e47166470a835d2421d50ee26f.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/aes_algorithm_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/9934/8389/files/56614454078.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woziki.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/
    • https://cdn.shopify.com/s/files/1

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006006.bin
acd0f5f7f9359a5a85836e0f65adb14d7a6d9835c45694c1d41d326b94a3724a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6006 5172 bytes
font_01_sfnt_off0000717d.bin
34e426fb621233ca466517a542537b419386af5d4ff200cb4b142416791f0827
pdf-font-stream PDF embedded font (sfnt) at offset 0x717D 10668 bytes