Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb235b6cdfe31167…

MALICIOUS

PDF

49.0 KB Created: 2020-09-02 04:16:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8dd5c51b53cbee516f41c6c9f263a8df SHA-1: ef9962a1c18d96a5c9e3f2b01155ca358058dced SHA-256: cb235b6cdfe311676bc0faaef474fab1c2ef92007f270dff68d8710c1a297cdb
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'free agenda format template' and the malicious URL, suggesting a social engineering lure. Additionally, the PDF contains a link farm heuristic, indicating a large number of outbound links, with the primary one being to a Shopify domain. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=free+agenda+format+template
    • https://cdn.shopify.com/s/files/1/0463/0331/4080/files/22152095552.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/fubebixaw.pdf
    • https://cdn.shopify.com/s/files/1/0448/2508/4065/files/absceso_periamigdalino_tratamiento.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/organic_chemistry_fourth_edition_janice_smith.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/pebufogibumemusakigomefid.pdf
    • https://static.usrfiles.com/ugd/90661f_0cc85eac9b9d46e5933dd7d6ee784650.pdf
    • https://static.usrfiles.com/ugd/b8c837_465373ec0b344726a94903262a0b3410.pdf
    • https://static.usrfiles.com/ugd/90661f_887d448d065f4c548eef8c3bacb4f86c.pdf
    • https://static.usrfiles.com/ugd/b8c837_cd6e12968b1e492685f902502269d625.pdf
    • https://static.usrfiles.com/ugd/91e123_f35b0362464c4db3bc41ef6b23cfc4df.pdf
    • https://cdn.shopify.com/s/files/1/0431/6472/9512/files/bible_in_gujarati_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/sherlock_holmes_novels.pdf
    • https://cdn.shopify.com/s/files/1/0436/2502/1603/files/anime_group_of_friends.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006fa3.bin
e1259ab8bdd64a6c3aff5b3ca93ba3e04f75188eb6e3ce680c6533d5176a0e22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 5140 bytes
font_01_sfnt_off0000810c.bin
d33d11f1ed5a13db730c96e22d98b9fca10d498f4f974fa8bef7b6b80606ed0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810C 9000 bytes
font_02_sfnt_off00009329.bin
5cbddb1933a2059eb4c420d167e1b412359ed80b37e58c6b15f8c8b0069dcdab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9329 11084 bytes

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