Malicious PDF — malware analysis report

Static analysis result for SHA-256 2763395a2009b2d0…

MALICIOUS

PDF

48.1 KB Created: 2020-08-02 21:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 000ff77165265385b2252fd8f2f742b5 SHA-1: 64bfb45789fc4e9f2c50f56a479335cfcb502c68 SHA-256: 2763395a2009b2d068946b0ebe05e0556ea46d0effd0c3b8b62311362e309f07
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDFs. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that likely serves as the lure. The primary attack pattern involves redirecting the user to malicious content via 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.ru/pify?keyword=natura+pest+control
    • http://files.emilysasia.com/uploads/1/3/1/1/131164236/8227644.pdf
    • http://files.inspiredayurveda.com/uploads/1/3/0/7/130739718/806141.pdf
    • http://files.my-tbl.com/uploads/1/3/0/9/130969695/kiwutomavevivinet.pdf
    • https://cdn.shopify.com/s/files/1/0434/1009/6284/files/90143201058.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/41673981453.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/stratified_k_fold.pdf
    • https://cdn.shopify.com/s/files/1/0432/6329/5646/files/17723688247.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/69769991469.pdf
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/bematikuwojazabikine.pdf
    • https://cdn.shopify.com/s/files/1/0433/8342/3128/files/48888268151.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/10649484180.pdf
    • https://cdn.shopify.com/s/files/1/0436/1460/1378/files/61735280405.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/pofinifulipora.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/gti_dsg_vs_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/86634157782.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_off0000716b.bin
83a13b8469704b8103426cdc39ee79b2c17e473375b46dda10026a63322d3f5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 4732 bytes
font_01_sfnt_off00008188.bin
36a8849a2bae2d7a6041a560477a15998772a06810b5bcbc7a39346af7bee5c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8188 11232 bytes
font_02_sfnt_off0000a5ba.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5BA 4324 bytes

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