Malicious PDF — malware analysis report

Static analysis result for SHA-256 91261630bb444330…

MALICIOUS

PDF

50.0 KB Created: 2020-09-06 19:16:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f99fc0fd44f0ccbcbdd828abf6174942 SHA-1: 2522f22a7ec59e6cae2f67101cc60bcf4eb809a7 SHA-256: 91261630bb444330eec1bcf7e40b5a9c9edd497f42a3c52c275a7dc64a355a14
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.link/wix?keyword=face+se+aadhar+card'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify, suggesting an attempt to obscure the true malicious destination or to generate traffic. The document body, though heavily obfuscated, contains the same keywords as the malicious URL, reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=face+se+aadhar+card
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/game_adelantado_trilogy_book_three.pdf
    • https://cdn.shopify.com/s/files/1/0431/9536/7585/files/63131564263.pdf
    • https://cdn.shopify.com/s/files/1/0428/2862/8124/files/24729007280.pdf
    • https://cdn.shopify.com/s/files/1/0463/6943/9899/files/hotel_room_booking_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0435/3343/5029/files/23661703817.pdf
    • https://static.usrfiles.com/ugd/41a0b6_8f8db043622a4273823b67328e3d0552.pdf
    • https://static.usrfiles.com/ugd/76156b_384dbb993cbf4c87abb84dbd15e518d7.pdf
    • https://static.usrfiles.com/ugd/3b7182_a135560928514442b962e17a426f79fa.pdf
    • https://static.usrfiles.com/ugd/868b90_771438aa9a1e417ea7e7db2655be6f6f.pdf
    • https://static.usrfiles.com/ugd/1d5a3f_cba93cd5fb9a4d75a18171ec5990c644.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9dd1f4941204249bc8796e2d77bc6a5.pdf
    • https://static.usrfiles.com/ugd/6f53d7_3cbcc7d08d474fd2bebe4c7e746302cc.pdf
    • https://static.usrfiles.com/ugd/3826db_eb74e62a90c9429d8badfed41c86da4d.pdf
    • https://static.usrfiles.com/ugd/35ddae_6c7e30f6c79e4ab7ab676731737cbd22.pdf
    • https://static.usrfiles.com/ugd/740d8c_614719c2c5ea4022969f0e492ad44308.pdf
    • https://static.usrfiles.com/ugd/eb4c03_848dc50ca61748029d0bc977264e79c4.pdf
    • https://static.usrfiles.com/ugd/ef7b09_c2f5649223bc4b8e9b46f3ef0597f402.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_off00006d8c.bin
5556ae64f22bfd2103e6efb00fe4c4d7e70a86473e7de287c0973cac6d50420d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D8C 4952 bytes
font_01_sfnt_off00007e55.bin
95e6ab000b660553e66aa5ab04a510b07ece41d7eeed332cb64511c661da592e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E55 10572 bytes
font_02_sfnt_off0000a29f.bin
30976cd77d7416f92a4d4e1127eef4b20530a20af9b2caa1cfb14bb79a14ef00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA29F 6956 bytes

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