Malicious PDF — malware analysis report

Static analysis result for SHA-256 7de426aecaa148e2…

MALICIOUS

PDF

50.0 KB Created: 2020-08-30 21:33:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8a2c87f36e48477c3088ba03237035dd SHA-1: d1130f97eb59bfba50dfe120e9882b28d41e11fc SHA-256: 7de426aecaa148e24d2b6c8847e167f78eefc11dd4f5cce5327582f1d4b08a34
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One of the primary links, 'https://ttraff.ru/wix?keyword=2008+volkswagen+jetta+wolfsburg+edit', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack.

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.ru/wix?keyword=2008+volkswagen+jetta+wolfsburg+edit
    • https://static.usrfiles.com/ugd/b8c837_eb4fea33ec3547b69151513ee97c5c2e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e35fb9174f764b579e129f622a8f2444.pdf
    • https://static.usrfiles.com/ugd/b8c837_de99a004d10848d0ae5c5c6978467e7e.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_b8b766d649d5407faa0e1cd4f4e0e115.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c35b01283ff43fba67a4d58f0c6487a.pdf
    • https://cdn.shopify.com/s/files/1/0438/3794/8061/files/cee_lo_game.pdf
    • https://cdn.shopify.com/s/files/1/0428/8161/3987/files/84520794608.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9232/0161/files/can_we_attach_in_mail_merge.pdf
    • https://cdn.shopify.com/s/files/1/0432/4468/3432/files/gobafokuboriwaje.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4011/files/80812015006.pdf
    • https://cdn.shopify.com/s/files/1/0437/6487/5418/files/employee_registration_form.pdf
    • https://cdn.shopify.com/s/files/1/0433/8008/0801/files/bagpipe_sheet_music_for_going_home.pdf
    • https://cdn.shopify.com/s/files/1/0461/5933/1491/files/narsingh_bhagwan_bhajan.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_off00008206.bin
fab2f0c4c0a4f7fe4c04de1e4e6f0a33028bcf7ece20e9e93e80e4744aab6eff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8206 5880 bytes
font_01_sfnt_off00009623.bin
b28416162d8f622119bd0407f01c9cacba631ba29d05896297301b52ed8008d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9623 11480 bytes

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