Malicious PDF — malware analysis report

Static analysis result for SHA-256 a86501b46a5d63f8…

MALICIOUS

PDF

61.6 KB Created: 2020-08-23 12:41:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b14b565d6974f0980013a6d99998e71b SHA-1: ba9728d11c2e487a886cfa25920d0ef4e1edaf57 SHA-256: a86501b46a5d63f8aac6b06709818cbde552e79a85c37a299f5707c26790671f
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=bleacher+report+europa+league+live+stream'. This URL is presented within the document body, suggesting an attempt to trick the user into clicking it. The presence of a large number of external PDF links also indicates a link farm, often used for SEO manipulation or distributing malicious content. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=bleacher+report+europa+league+live+stream
    • http://files.tobaccofreewisconsin.org/uploads/1/3/0/9/130969452/62f2dc2523.pdf
    • http://files.hpccdenver.org/uploads/1/3/1/4/131438423/2598777.pdf
    • https://cdn.shopify.com/s/files/1/0439/4231/4152/files/pdf_to_dwg_converter_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/byod_policy.pdf
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/bevuxogibazukerilimadabo.pdf
    • https://cdn.shopify.com/s/files/1/0433/9476/0862/files/20988415272.pdf
    • https://cdn.shopify.com/s/files/1/0461/8980/5731/files/splashtop_wired_xdisplay_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/2078/7613/files/vampire_the_masquerade_v20.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17844710077.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/jejutisomopewu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4575/4792/files/biology_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/vafuxufubifobofefemeruju.pdf
    • https://cdn.shopify.com/s/files/1/0430/4781/3269/files/fozifoduselude.pdf
    • https://cdn.shopify.com/s/files/1/0431/9313/9364/files/balonaxejegowomov.pdf
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/46765946605.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006942.bin
5cf2d71805dacebb66062bf6258afbe9a0446ac0769031fe7917c58091c69427		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 6980 bytes
font_01_sfnt_off00007ae0.bin
d7a74a8f7f5b6061d1704e49d55b25e97137b941398fa138ccd077d4d208d331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AE0 3136 bytes
font_02_sfnt_off0000860c.bin
e63666fb29f06b395a962f9772865448f5d9a494327f1a39a20d1759875a8cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x860C 5456 bytes
font_03_sfnt_off00009875.bin
55a2fdf1196eb9abba28cbeb90153f433d4cd9b1bb923654eba726d70342e418		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9875 6252 bytes
font_04_sfnt_off0000ac19.bin
1d889aa4105f5a87beabedb3144ed86c65783beab614e81bcc8cba4daa04dd9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC19 10840 bytes
font_05_sfnt_off0000d17a.bin
b1a8d8a55104966784973262ca87b601cfebcee1e0a8464929735f537deb94ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 16392 bytes

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