Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c50b919f72fe6a6…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 18:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e89d232a7542d984feb149051d98ebb SHA-1: 7db71b3abf4626587ce8046931db4bde2bb0ec71 SHA-256: 6c50b919f72fe6a6b46c46445d38c75f363f79c98638f2c37b3edc22ee9b1b91
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits a PDF link farm heuristic, suggesting an attempt to distribute or obscure malicious links. The ML classifier strongly indicates maliciousness. The embedded URL 'https://ttraff.com/wix?keyword=estructura+de+kekule' is the primary IOC, likely leading to a phishing or malware download page.

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.com/wix?keyword=estructura+de+kekule
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/5657/8206/files/denon_receivers_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8434/9591/files/38146295870.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8056/files/sinogisilef.pdf
    • https://cdn.shopify.com/s/files/1/0432/3088/8103/files/benim_hocam_corafya_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/5092/5223/files/ardy_cloak_1_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0437/5488/1175/files/tv_show_guide_perth.pdf
    • https://static.usrfiles.com/ugd/c1de29_5b7d18b6488c40b9ad3a279a3ba0cacc.pdf
    • https://static.usrfiles.com/ugd/b8c837_538721c2a6c542a3807f4fcdeba1b002.pdf
    • https://cdn.shopify.com/s/files/1/0437/6949/5713/files/best_reader_for_android_phone.pdf
    • https://cdn.shopify.com/s/files/1/0433/3348/4699/files/fobeturam.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f9c.bin
0a4df9b069c14bfb047ded5ace684c696be455913d2f0947c1b698354d86d82e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9C 4952 bytes
font_01_sfnt_off0000807a.bin
ce22aceb84345c100b9bbef689d2b2d1bd6200094e6b45838c13db9e5f8433e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x807A 11372 bytes