Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e63c24b26c3c59…

MALICIOUS

PDF

86.3 KB Created: 2020-09-18 23:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 00c5a5789eac51912c21e58c9293e57a SHA-1: 047521433a314f23c8912e5afc5b1c92e9d4a709 SHA-256: 85e63c24b26c3c59264333ea362d2d100b541d6e11117cd0fa4623ffc4de4324
150 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=heart+diagram+labeled+anatomy', which is also flagged as a malicious redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware delivery.

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.me/wix?keyword=heart+diagram+labeled+anatomy
    • http://files.champaigncentralc3.org/uploads/1/3/0/7/130776656/tadudumikerame.pdf
    • http://files.riveroflifergv.org/uploads/1/3/1/3/131378990/b08b4c.pdf
    • https://cdn.shopify.com/s/files/1/0463/0675/4717/files/menato.pdf
    • https://cdn.shopify.com/s/files/1/0439/2986/2312/files/bibuveriwupokobavusebas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/hollywood_full_movie_in_tamil_isaimini.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3894/files/labetuxalububoveko.pdf
    • https://cdn.shopify.com/s/files/1/0431/5283/4717/files/jesukunowuvuloj.pdf
    • https://6a8bd57f-994b-42bc-857f-afda3281d6cd.filesusr.com/ugd/a32c20_8ff1fb1133954281a4a21337afee5dbc.pdf?index=true
    • https://9385e0a7-b904-4c67-b351-2f258986513f.filesusr.com/ugd/1e32c2_7d5c6b00176f44e9b316afc2fd4304a1.pdf?index=true
    • https://f27965f6-4fab-4252-9f71-e1cfa9d527c8.filesusr.com/ugd/590778_83c75e5e9e4c488a9f064320510d78d7.pdf?index=true
    • https://94124eae-cf5e-4b3c-8746-b0b56de0a0de.filesusr.com/ugd/11b39a_fbd467de0b174eec9eee0c768463692e.pdf?index=true
    • 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_off00010a35.bin
5bc1dca8cef53956717ffd5a858b98031136cce80560c2c907cd6bb94b33d836		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 4960 bytes
font_01_sfnt_off00011af5.bin
7572de7f8f768f6c75701a9c1591eaa096e7d31d63702483360cb953ea9e3c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF5 10344 bytes
font_02_sfnt_off00013e57.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E57 4324 bytes

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