Malicious PDF — malware analysis report

Static analysis result for SHA-256 54808f9fab03fe48…

MALICIOUS

PDF

40.2 KB Created: 2020-08-16 15:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a7bf881e6cfc1f66837c34b5ae21939 SHA-1: a104a28c47d40d30b7ed11c048ae991120537add SHA-256: 54808f9fab03fe48f9410cec8ca8e19b70176d6bc04f56e417e49e47d701cae6
120 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, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same URL. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on Shopify. The primary malicious URL is 'https://ttraff.ru/pify?keyword=dictionary+bengali+to+english+free++pdf', which likely serves as a lure to download 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/pify?keyword=dictionary+bengali+to+english+free++pdf
    • http://files.janefredericks.com/uploads/1/3/1/8/131856134/c025affa760ccb0.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/mekanisme_ampicillin.pdf
    • https://cdn.shopify.com/s/files/1/0440/7748/2136/files/18940237499.pdf
    • https://cdn.shopify.com/s/files/1/0428/7945/1295/files/basorurufobujevadipiva.pdf
    • https://cdn.shopify.com/s/files/1/0429/4977/1430/files/46134552661.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/77654421744.pdf
    • https://cdn.shopify.com/s/files/1/0436/4635/3561/files/minecraft_tpa_plugin.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5093/files/53068470991.pdf
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/lilobifabesiludokijiban.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/kujisuxamumogobosubaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/9052/5849/files/rrb_ntpc_admit_card_bilaspur_2019.pdf
    • https://cdn.shopify.com/s/files/1/0437/4636/1505/files/44937211061.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_off00004cd7.bin
fcd3ea7002139c9b250179dc70a7bd08747989951a78c0595bc08d153c6fa1aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CD7 5660 bytes
font_01_sfnt_off0000600c.bin
debe6b5751ecee02a632a4d365dc6f3d9954f772362e9a17fb239842d3ac18fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600C 5288 bytes
font_02_sfnt_off0000714f.bin
e8e089a6ebffa0b41304e584efbec55ebd10256e78b0183a05d95cd28f8a2077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x714F 9952 bytes

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