Malicious PDF — malware analysis report

Static analysis result for SHA-256 a55296c2d5b32324…

MALICIOUS

PDF

69.2 KB Created: 2020-07-31 08:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc6c326c586e03192d19ae07de9f9a33 SHA-1: d146f878f2519fe00b314058ee3f84bb5ac5f3f0 SHA-256: a55296c2d5b32324dda6ba7d4e17aaed28624c017461bd344eb73f68cd225618
150 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to domains known for hosting malicious content or redirecting to such sites. The primary redirector URL identified is ttraff.com, which is flagged as malicious. The document body is heavily obfuscated and appears to be junk data, suggesting the PDF's sole purpose is to host these links.

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=bestiary+pdf+pathfinder
    • http://files.acubyhoma.com/uploads/1/3/0/7/130775222/sutaxes.pdf
    • http://files.s2alphafirearmstraining.com/uploads/1/3/0/7/130776204/90f6d57409d5297.pdf
    • http://files.coloradosnakes.com/uploads/1/3/0/7/130776655/75b0d3fa1.pdf
    • http://files.ezs.nl/uploads/1/3/0/9/130969036/rerubupu_tavirunimurube.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/gojizezakagurakukuvade.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/18751422401.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/fejogofoxawulexefibubisog.pdf
    • https://cdn.shopify.com/s/files/1/0435/2537/4103/files/32668585858.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/80092223503.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/jininagulirefawinep.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/kekasovujalafafeluvikevaj.pdf
    • https://cdn.shopify.com/s/files/1/0429/0369/9615/files/tomebivenurafowowowud.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tizerosotusalasebix.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/94800628921.pdf
    • https://cdn.shopify.com/s/files/1/0435/7187/1912/files/60189621720.pdf
    • https://cdn.shopify.com/s/files/1/0428/4953/4111/files/mipoxorexedoxixo.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3464/files/74611051777.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_off0000d426.bin
36483b1c55036f3093e72597919b0cef542303d6a754599ea4559760350dfb14		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD426 4924 bytes
font_01_sfnt_off0000e4e2.bin
9378fdd298efee20cdacbb94dda7ce410242d7405b0a4951174db6ad001cd159		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E2 10228 bytes

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