Malicious PDF — malware analysis report

Static analysis result for SHA-256 c76bf2e5a0fddbe7…

MALICIOUS

PDF

42.0 KB Created: 2020-09-04 06:23:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b250af9d2a19ab8765498003eba2c41 SHA-1: 96174666b7ac558cf047ad922ab7e03580a38eca SHA-256: c76bf2e5a0fddbe70dc0232202a323c012ab1cfef5ad217e9c5cb9758fb6a348
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a prominent link that redirects to a URL associated with malicious redirector infrastructure, specifically designed to lure users with a fake 'Adobe Reader' download. The document body itself contains obfuscated text and the malicious URL, reinforcing the social engineering attempt. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning or distributing further malicious content.

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.club/wix?keyword=adobe+reader+10+for+windows+7
    • https://cdn.shopify.com/s/files/1/0427/6515/6508/files/zoduxuvokalesilid.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1562/files/rodozusogukekeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/rokenofimu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6505/files/11570653823.pdf
    • https://static.usrfiles.com/ugd/de65f7_35a951aac4ab432c942a453aefef243d.pdf
    • https://static.usrfiles.com/ugd/b8c837_669cf7f73d7d47788a173a295d4e4d50.pdf
    • https://cdn.shopify.com/s/files/1/0428/5448/2079/files/free_kalimba_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/lisozarewivobuwo.pdf
    • https://cdn.shopify.com/s/files/1/0435/2645/5455/files/96164189304.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/masobaneliwipozin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8452/9310/files/bonixilozez.pdf
    • https://cdn.shopify.com/s/files/1/0432/9455/6324/files/63403558166.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/91719940450.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/return_to_life_jim_tucker.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5145/files/55062865368.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/
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/917199404

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061b7.bin
0e9e0d74391ca0e0d7131d44f97096e62515b050091784163da5e95bb38f7e8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 5364 bytes
font_01_sfnt_off00007420.bin
2a1321c9eb16a7efa15dd0b36745ac11d781f278128be34847983340b5564026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7420 10896 bytes

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