Malicious PDF — malware analysis report

Static analysis result for SHA-256 465ee6a96ced4ba6…

MALICIOUS

PDF

39.9 KB Created: 2020-08-15 09:29:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8f960bfe9cecc7a194429cc81815a07 SHA-1: 786c82c3bc1247068417f7a0af810aa1a5216719 SHA-256: 465ee6a96ced4ba6f24598dbb31987b6db9129fb0c050fb281d36873e9aeca62
150 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the text 'Karcher k7 manual' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=karcher%20k7%20manual
    • http://files.acuityworks.com/uploads/1/3/1/3/131379748/6c253247d5ed.pdf
    • https://cdn.shopify.com/s/files/1/0436/2603/7411/files/prolactinoma_in_pregnancy_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/twitch_minecraft_increase_ram.pdf
    • https://cdn.shopify.com/s/files/1/0437/6546/5249/files/41918724393.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gefoviliruvowej.pdf
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/55550462898.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/shroud_csgo_settings.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97242885008.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/xuzalawajaruxajufur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/96294551088.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tovovowegafakaroseras.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_off00005794.bin
8b9018dd0c48ca7a6b439c4ea39122dc439c0467942130fd47511f69ad96216c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5794 4976 bytes
font_01_sfnt_off0000685c.bin
fce4f09fd0407d967a79117513c6eb7b278036c648ee6430247b9f4d3bc7865c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x685C 13812 bytes

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