Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f443ac7f34c28f1…

MALICIOUS

PDF

45.5 KB Created: 2020-08-12 04:15:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47d6030bebeff1427238fa0bae51f3c5 SHA-1: 8ae219126d770a650ace1e1051487b2891a14adb SHA-256: 9f443ac7f34c28f1c58d8784c9a65c7cba7067ea9d089e90fdf6e1a1b586457e
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is part of a link farm. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading a PDF, further supporting the malicious redirection attack pattern.

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=catechism+of+the+catholic+church+pdf+2020
    • http://files.shadyblueamstaffs.com/uploads/1/3/1/3/131384380/xirodoxexu-fewek-rorudubof.pdf
    • http://files.goldendinosaurs.com/uploads/1/3/1/4/131437806/kemuniwutasumab-letuwosawadati-tokugovulal-vubuwekevofusaz.pdf
    • http://files.warrickchamber.org/uploads/1/3/0/8/130814205/817f37e9aa58.pdf
    • https://cdn.shopify.com/s/files/1/0428/8518/5702/files/83084038098.pdf
    • https://cdn.shopify.com/s/files/1/0431/3445/1874/files/pakogobemixakogasidaluv.pdf
    • https://cdn.shopify.com/s/files/1/0432/7420/7387/files/49111001183.pdf
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/56129211980.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40369191557.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/ginobajikobufin.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6564/files/studies_in_pessimism_schopenhauer.pdf
    • https://cdn.shopify.com/s/files/1/0434/1760/0152/files/romugalagunogevagupap.pdf
    • https://cdn.shopify.com/s/files/1/0432/8960/8360/files/sobejovipe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/88095015422.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/notukojaxamafadij.pdf
    • https://cdn.shopify.com/s/files/1/0448/8301/7895/files/50608100115.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000715a.bin
3005ad687b1658ddc03e9d7526c65647ab16b171554450be295bde1bc85ae62a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x715A 5572 bytes
font_01_sfnt_off00008423.bin
657c140b79fcda10fc5ff8396a3becceda7ba23ae2720e0b62a7c595e9310d38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8423 10820 bytes

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