Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2678b894cdfa0fc…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 22:44:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8316b561a344cc1e6b79d004e6c7743d SHA-1: d1a4e3ce09f5039ad84294f3287ad413cae7bb0f SHA-256: f2678b894cdfa0fc1802bc87c0da8dd0d80c7ca08915e640226f32c978874652
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/wix?keyword=chevy+silverado+rally+stripes', which is flagged as malicious. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious URL.

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=chevy+silverado+rally+stripes
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/5432256059.pdf
    • https://cdn.shopify.com/s/files/1/0465/5031/9262/files/windows_battery_report_command.pdf
    • https://cdn.shopify.com/s/files/1/0433/6707/1894/files/sedipigiwiduzemudutex.pdf
    • https://static.usrfiles.com/ugd/b8c837_82215c7f92a84d68842c521fdb60dc0b.pdf
    • https://cdn.shopify.com/s/files/1/0437/8374/9789/files/tiregegusub.pdf
    • https://cdn.shopify.com/s/files/1/0434/2009/0535/files/biggest_loser_logo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/skate_3_pkg.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3915/files/60159328172.pdf
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/pawikisabapav.pdf
    • https://cdn.shopify.com/s/files/1/0464/7246/2486/files/tomodachi_x_monster_read_online.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_off00005af2.bin
e505dff3a451cde47032daa7fa5d39b00d49bf8d9128c2154af34b664a872422		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF2 4916 bytes
font_01_sfnt_off00006bc7.bin
f2c7fd9d8498548b6eca46c21b4aa7d3077215e7ccb3cde64f8e8982bc53bca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC7 9928 bytes
font_02_sfnt_off00008dad.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8DAD 4324 bytes

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