Malicious PDF — malware analysis report

Static analysis result for SHA-256 cca757067aea91f6…

MALICIOUS

PDF

45.3 KB Created: 2020-08-29 03:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d38a2719851d09a3b43f7ac06d0218b SHA-1: bf5e5d78cb0f32f9b95f3d5d0b5b1e8ce5c2a4bc SHA-256: cca757067aea91f69ef54de256ba321b54b9c94f6bc316cec35307b2b58c6a61
120 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a solution to a game error. The document body, though heavily garbled, contains text related to 'gta 4' and 'error', reinforcing the lure. The PDF also hosts a link farm, with multiple links pointing to static.usrfiles.com, suggesting an attempt to manipulate search engine results or distribute further malicious content.

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=gta+4+t%25C3%25BCrk%25C3%25A7e+yama+%25C3%25A7al%25C4%25B1%25C5%259Fmay%25C4%25B1+durdurdu+hatas%25C4%25B1
    • https://static.usrfiles.com/ugd/b8c837_b644774a7460409fb246c2c0605552bb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ccfb870c11294a28beb93c9af028b92f.pdf
    • https://static.usrfiles.com/ugd/b8c837_602c05a849d546098200e4b899127598.pdf
    • https://static.usrfiles.com/ugd/b8c837_520e0afa70a04556820ab16d798d558c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/bivunamu.pdf
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/49423944845.pdf
    • https://cdn.shopify.com/s/files/1/0434/0786/8060/files/la_times_crossword_puzzle_answers_saturday.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8136/files/venupimifakusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/9446/6969/files/camus_the_stranger_free.pdf
    • https://static.usrfiles.com/ugd/b8c837_fab6ea02989040ffa9f81bd0e7f73aa6.pdf
    • https://static.usrfiles.com/ugd/b8c837_998c35b929f94114bcb44703786bc381.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_off000060b1.bin
32e87fd72055e52cc3eef10a131392bbcaf8458d48a6927f7a046527d3c4e72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60B1 5552 bytes
font_01_sfnt_off000072d4.bin
c0753a89629ee87245f579c67cbef534caa6836c4e9be9b4dfee187a7ce2c743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72D4 11812 bytes
font_02_sfnt_off000097e9.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97E9 4324 bytes

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