Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e3323b8d18b678…

MALICIOUS

PDF

69.1 KB Created: 2020-08-05 23:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b34a548f6a6a9a504f606da3d62ebfac SHA-1: be01f6e4b61d7fe686970b44f65ecedf481508de SHA-256: 37e3323b8d18b678f2c6ae157163edd5e0bf278ee0e49b5b8823452386f0a5e3
150 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=brothers+grimm+fairy+tales+pdf', which is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

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=brothers+grimm+fairy+tales+pdf
    • http://viwof.artbyryanfinley.com/uploads/1/3/1/0/131071243/2291979.pdf
    • http://files.marengotzmann.net/uploads/1/3/1/3/131384407/nimat-zemerexa.pdf
    • http://files.contractresource.net/uploads/1/3/0/9/130969211/4ad70152ac7c4.pdf
    • http://files.martabrysha.com/uploads/1/3/0/8/130813769/pivoxifuvefarup_sovutelipunul_poweginevitiv_kuwite.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/capitalismo_monopolista_netto.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/22978141792.pdf
    • https://cdn.shopify.com/s/files/1/0434/5895/3369/files/mavugiporo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2993/7832/files/rumav.pdf
    • https://cdn.shopify.com/s/files/1/0431/4379/0760/files/udp_9_rarbg_com_2710_announce.pdf
    • https://cdn.shopify.com/s/files/1/0433/6697/3589/files/32015934422.pdf
    • https://cdn.shopify.com/s/files/1/0431/1220/2389/files/61282297871.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4263/files/5670493421.pdf
    • https://cdn.shopify.com/s/files/1/0431/8950/2110/files/fundamentals_of_computer_graphics_marschner.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0711/files/alice_in_chains_don_t_follow_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0435/3379/5477/files/bwv_974_piano.pdf
    • https://cdn.shopify.com/s/files/1/0429/3656/5923/files/19755353394.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_off0000be73.bin
909bc0941f97bac2cc6e12f2a00a0becad1197965c9c5d12269d3c08777fb89e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE73 5604 bytes
font_01_sfnt_off0000d162.bin
0418b2e6c7e5fe49da89b930d5dcfd9d4d100d97c58e2adf45aeab136aebe18b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD162 17728 bytes

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