Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e56ea17f2a9e4d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-04 17:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4820cce5f24610f2f17a25b2c181eb1 SHA-1: 93d0e5246be40b85ff49b165e11a3d5ef37b6215 SHA-256: c3e56ea17f2a9e4d0f07f7487ca69928cc70bde0d15f4a44e9abc55b4210c424
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure related to medical information, likely to trick users into clicking the malicious link.

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.com/pify?keyword=arteritis+temporal+sintomas+pdf
    • http://files.melchersacredheart.com/uploads/1/3/0/7/130776594/jazepejitevi.pdf
    • http://files.clubsandcommunity.com/uploads/1/3/1/4/131453031/6ec97c.pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • http://files.microcarandscooterclub.org/uploads/1/3/1/1/131163667/rijem_rofefa_bizil.pdf
    • https://cdn.shopify.com/s/files/1/0433/3282/9342/files/wordly_wise_3000_book_5_lesson_8.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4957/files/rajuwobadowixik.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5712/files/84934374043.pdf
    • https://cdn.shopify.com/s/files/1/0436/0781/8398/files/6234069822.pdf
    • https://cdn.shopify.com/s/files/1/0437/7850/6909/files/1985_honda_rebel_250.pdf
    • https://cdn.shopify.com/s/files/1/0432/9304/8992/files/9150354193.pdf
    • https://cdn.shopify.com/s/files/1/0430/7946/7170/files/rival.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7415/files/john_deere_d155_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/vigutokejamojepasuwomuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0880/2468/files/runivaduw.pdf
    • https://cdn.shopify.com/s/files/1/0430/7540/3929/files/49139071681.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1511/files/suzivixujipaliwodizew.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_off0000721f.bin
78215cb23728a9e0d46d1c6b9b0415258241232b967979e6d1e013583f23fa35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x721F 5176 bytes
font_01_sfnt_off000083a2.bin
fd8e683bce6ede943f41c21bb6d62d0b24659132e9af74691f8049174ca3378f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83A2 10372 bytes

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