Malicious PDF — malware analysis report

Static analysis result for SHA-256 f301cf7c36f38bca…

MALICIOUS

PDF

52.0 KB Created: 2020-08-12 23:32:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a5ad2d2569a753a230e7a7818f79616b SHA-1: 2a2db3747816a2da8e472d26887ebb6d465cec18 SHA-256: f301cf7c36f38bcaa9e5339ef535418c6b9c5f905a6dc535225b7896c6ef1fbd
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract users searching for specific book downloads. This suggests a phishing or malware distribution attempt, likely using the embedded links to redirect users to malicious sites or download further payloads.

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=automobile+engineering+full+book+pdf+download
    • http://files.emilygillcrist.com/uploads/1/3/1/4/131406258/nukebukekizotiruk.pdf
    • http://files.byyoursidecounselling.co.uk/uploads/1/3/2/8/132816091/3361020.pdf
    • http://dedaja.joinpmcc.org/uploads/1/3/1/4/131407469/7418625.pdf
    • https://cdn.shopify.com/s/files/1/0440/6630/8246/files/fukavuri.pdf
    • https://cdn.shopify.com/s/files/1/0438/7602/4475/files/91173286410.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/linux_mint_best_reader.pdf
    • https://cdn.shopify.com/s/files/1/0431/6777/6919/files/karazobozeg.pdf
    • https://cdn.shopify.com/s/files/1/0439/0069/8792/files/envision_math_4th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0431/8658/5749/files/wuxalikepunopewibiwe.pdf
    • https://cdn.shopify.com/s/files/1/0438/1782/8512/files/44098731351.pdf
    • https://cdn.shopify.com/s/files/1/0437/5193/2065/files/college_algebra_word_problems.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/lijeguvanarep.pdf
    • https://cdn.shopify.com/s/files/1/0430/0098/7811/files/3334490823.pdf
    • https://cdn.shopify.com/s/files/1/0430/7219/2669/files/straightforward_beginner_test.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/wholly_sanctified_a_b_simpson.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_off000075d0.bin
c4d388a4a7a51fc574436c2ce8e631aa3591f59572593fdb7c94ad5c0cac8e85
pdf-font-stream PDF embedded font (sfnt) at offset 0x75D0 5468 bytes
font_01_sfnt_off0000885d.bin
2d35fe1b112251630f6c3e185fb4bf58c6327cea99f60afab3ca0473214b5b30
pdf-font-stream PDF embedded font (sfnt) at offset 0x885D 2116 bytes
font_02_sfnt_off00009229.bin
778ba4d721ba4d181ac53a00ef2c0679be6fa5e49d96893b1464b262a61e9214
pdf-font-stream PDF embedded font (sfnt) at offset 0x9229 15552 bytes