Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f08b6d5591b0784…

MALICIOUS

PDF

42.8 KB Created: 2020-08-16 14:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b41f94c26dc0751b1066f21e99e68af SHA-1: 2201738fcb1e3207305a9147155dd3e864129758 SHA-256: 9f08b6d5591b0784739306f9fcbafdf531c3c978c4a6a433a2f1187d6c15919b
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'Astroturf installation guide' and the malicious URL. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly legitimate channels. No scripts were extracted from this sample.

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/pify?keyword=astroturf+installation+guide
    • http://files.lachicanalaundrypictures.com/uploads/1/3/1/4/131409305/104090.pdf
    • https://cdn.shopify.com/s/files/1/0433/5907/6502/files/44027223064.pdf
    • https://cdn.shopify.com/s/files/1/0433/3984/1695/files/kipoxofajen.pdf
    • https://cdn.shopify.com/s/files/1/0436/7217/4745/files/67029287449.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/zufoniletidaletamokozuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/kixetuduvexutegewerojuseb.pdf
    • https://cdn.shopify.com/s/files/1/0437/7968/6549/files/29416491831.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/nz_guidelines_for_cholesterol_levels.pdf
    • https://cdn.shopify.com/s/files/1/0428/4825/6156/files/dizalasesokarini.pdf
    • https://cdn.shopify.com/s/files/1/0445/3695/5044/files/archicad_17_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0433/1382/3909/files/hillbilly_elegy_free_download.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_off00006ab7.bin
ed515c95f01e52eefcd3c6225bd2c5d06eacd9afb729ccc7ccccf55b7c693f86		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB7 5064 bytes
font_01_sfnt_off00007bf9.bin
87546c84c0eef23152cf60d05d8c063ffafabb0113e146ade3f1e31b3ea3a752		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF9 10240 bytes

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