Malicious PDF — malware analysis report

Static analysis result for SHA-256 48765975b6127e9c…

MALICIOUS

PDF

60.9 KB Created: 2020-08-09 00:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3f7734177549ee0f3eb22303d1276cfb SHA-1: 439d4fa2a335e412c000fab6e5a74c654fffd229 SHA-256: 48765975b6127e9c1ec0949b8a3e191dabf18ab0fdfb0d232bd392e2726b194f
120 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is a PDF related to arithmetic functions, likely a lure. The presence of numerous external links, including to Shopify domains, indicates a link farm strategy to obscure the malicious redirector.

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=introduction+to+arithmetic+functions+pdf
    • http://files.adossdesigns.com/uploads/1/3/1/6/131636852/jelewisa_gojevujerez_xobimup.pdf
    • http://files.strongmansmennonitefurniture.com/uploads/1/3/0/7/130739463/274234.pdf
    • http://files.thorneaircon.com/uploads/1/3/1/0/131069819/9136562.pdf
    • https://cdn.shopify.com/s/files/1/0431/7629/6614/files/cenarion_expedition_rep.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/41196761290.pdf
    • https://cdn.shopify.com/s/files/1/0434/4525/6344/files/add_all_files_to_git.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4823/files/virtual_dj_pro_7.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8777/files/jerekana.pdf
    • https://cdn.shopify.com/s/files/1/0435/4313/4362/files/70731591505.pdf
    • https://cdn.shopify.com/s/files/1/0428/5943/0054/files/beef_lasagna_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0428/6673/7311/files/48979233544.pdf
    • https://cdn.shopify.com/s/files/1/0435/1423/3000/files/systematic_bacteriology_notes.pdf
    • https://cdn.shopify.com/s/files/1/0435/8717/4557/files/75870465739.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_off00009163.bin
ad0e750487061a0696fb496763c923ec636d6b66dc7c685991bac63f9c8f074e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9163 5300 bytes
font_01_sfnt_off0000a340.bin
a64767b6fcc37e23d086951e81cb1a5f1e99a3f56a5f720553a8564bf00df257		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA340 14368 bytes
font_02_sfnt_off0000d0e0.bin
bf1adf44c8ca709d306c4b8112552ec587dfeb62a67a066c9d7767d3a822b018		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E0 16184 bytes

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