Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d15bf896716ae6c…

MALICIOUS

PDF

44.0 KB Created: 2020-09-13 10:28:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eb0a2ea1c6c2ecd6cddb2b23b3fa7fbc SHA-1: 6db260aadf112c7ed0d35c051a77267da8c25a25 SHA-256: 3d15bf896716ae6ce5b8374132e05a04541d1a7c4be2e3f656a5595707e6324d
154 Risk Score

Malware Insights

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

The PDF contains embedded links that point to known malicious redirector infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to a 'Toyota corolla 2015 manual for sale', which is likely a pretext to encourage clicking the malicious link. The PDF_SEO_LINK_FARM heuristic further suggests this document is part of a larger link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.club/wix?keyword=toyota+corolla+2015+manual+for+sale
    • http://files.chrismurraywheelworks.com/uploads/1/3/1/4/131407918/a3b8106.pdf
    • http://rovujo.mysje.org/uploads/1/3/2/7/132740267/biguwokep.pdf
    • http://files.tanyablackwell.net/uploads/1/3/1/3/131398547/ferajug.pdf
    • https://static.usrfiles.com/ugd/f63f29_91b307126c4249629a007b56f896d355.pdf
    • https://static.usrfiles.com/ugd/f515ca_0f9fef496c6f4c89b131b0dd0a5febd4.pdf
    • https://static.usrfiles.com/ugd/8ff694_124e040100374827b15ef95f5c696c9e.pdf
    • https://static.usrfiles.com/ugd/b8c837_1ab7aa43f7d349649b9810f4c1f2a2e6.pdf
    • https://static.usrfiles.com/ugd/fd3290_662dcab5d3c64ee5bc019c453fc2bef6.pdf
    • https://static.usrfiles.com/ugd/01f9b9_f5646790bbd4433190deee8bded480dd.pdf
    • https://cdn.shopify.com/s/files/1/0430/3169/1421/files/71528020339.pdf
    • https://cdn.shopify.com/s/files/1/0431/3638/5175/files/92930363300.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/lukezalarun.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_off00006031.bin
66be6f8532ad7b4092a903554867f5d112b850fd445f727613bf03f0d0453587
pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 5364 bytes
font_01_sfnt_off00007264.bin
d92e7cb1d870324e69b8fd5347fd76410f9e7ad3f36ab522f4e6bbf4d64241f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7264 10180 bytes
font_02_sfnt_off0000951f.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x951F 4324 bytes