Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f666be69e8cf793…

MALICIOUS

PDF

32.9 KB Created: 2020-08-02 07:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bd7afdf11be80f0544b0484a6dfd5f6a SHA-1: bf46f4de390191cd0005a0ad3af4e23b1cc912a9 SHA-256: 1f666be69e8cf7936087748438f46a5b88b3eefb5ce61e542f4e83f7d3f2c61b
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.cc/pify?keyword=fundamentals+of+engineering+thermodynamics+moran+pdf', is designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, contains references to the same URLs, reinforcing the lure. The presence of multiple PDF links suggests a tactic to distribute malicious content or phishing pages.

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.cc/pify?keyword=fundamentals+of+engineering+thermodynamics+moran+pdf
    • http://files.acrobaticdivision.com/uploads/1/3/1/4/131438353/b4c28d4027f7.pdf
    • http://files.interlinkstone.net/uploads/1/3/0/8/130873769/fuduk-mobobonadatur-zobazixa.pdf
    • http://files.msquareddining.com/uploads/1/3/1/6/131607043/kudisito.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/magic_bullett_express.pdf
    • https://cdn.shopify.com/s/files/1/0431/2635/8173/files/27050041383.pdf
    • https://cdn.shopify.com/s/files/1/0435/1324/9944/files/vusatidasudagoxokudumo.pdf
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/59945652894.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1864/files/mufepizuburopavebuxesus.pdf
    • https://cdn.shopify.com/s/files/1/0430/9073/9361/files/pobik.pdf
    • https://cdn.shopify.com/s/files/1/0435/9369/5395/files/dovasoximupikipesiveg.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/81081228302.pdf
    • https://cdn.shopify.com/s/files/1/0429/6425/4883/files/24520774630.pdf
    • https://cdn.shopify.com/s/files/1/0441/4291/9832/files/43020794981.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3876/files/dinimap.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_off000044d3.bin
fef76a6b663362548aa657d2761b761392e828584a9925e0a098522757819a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x44D3 5628 bytes
font_01_sfnt_off000057d8.bin
adcf19eddbc922f635a6997f45b79cf5c93591310ad072fe07b6e63927854001		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D8 8964 bytes

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