Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b24e35dcf590cf6…

MALICIOUS

PDF

36.9 KB Created: 2020-08-02 21:20:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba0bb35d6be17fd23a735f353769364c SHA-1: 7a10c02fe42ce94b1fbd2170464441cec3f0920e SHA-256: 3b24e35dcf590cf6cd85d0608843607b96574cc32b9727d96143a7b822560c3c
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=2040+john+deere'. This indicates an attempt to direct users to malicious infrastructure. The document body, though heavily obfuscated, contains this URL and other embedded URLs, suggesting a phishing or scam attempt. The presence of numerous external PDF links also aligns with SEO-based link farm tactics often used to obscure malicious destinations.

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.ru/pify?keyword=2040+john+deere
    • http://files.steamuptheclassroom.com/uploads/1/3/1/6/131637178/kupar_kotesotikeliguf_rurovorikor_zilalelobemom.pdf
    • http://files.evelandfarm.com/uploads/1/3/1/4/131436971/93088aafe1eb3.pdf
    • http://files.riserailsbacksports.com/uploads/1/3/2/6/132682929/gonizul.pdf
    • https://cdn.shopify.com/s/files/1/0431/6289/4498/files/30840728759.pdf
    • https://cdn.shopify.com/s/files/1/0431/6823/5682/files/kilazudajigogukorowuwopow.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0999/files/tepavilijejanivirolonagep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/90379225571.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8250/files/70806479273.pdf
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/64973225998.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/fafikimavodoxa.pdf
    • https://cdn.shopify.com/s/files/1/0436/3390/1726/files/55947773298.pdf
    • https://cdn.shopify.com/s/files/1/0436/2308/8290/files/54068749292.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/dopole.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7365/files/bokamomerirafa.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_off000046a4.bin
bc83087b129d8f15b0ebd4d338656963f804728c98b31465d339bff4040d5906		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A4 4496 bytes
font_01_sfnt_off000055ca.bin
748df0a8d5cd9089559c6818445cb0b7a47610d044cadd6c3e22cc3ea3d5bc00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55CA 10708 bytes
font_02_sfnt_off000077bc.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77BC 4324 bytes

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