Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb6e641e6c8a777a…

MALICIOUS

PDF

47.9 KB Created: 2020-08-08 10:04:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76031976844de6f904239a02264535b SHA-1: 9be47f9a39b1d89f3a356a3f0bcf7368e5ca3156 SHA-256: bb6e641e6c8a777ac2cf9f1bb40d00686ab7599e15b13bbfb9980d421c632623
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with SEO link farms. One critical heuristic identified a direct link to a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains this redirector URL and other URLs that likely serve as lures. The primary attack pattern involves redirecting users to malicious infrastructure through these embedded links.

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.cc/pify?keyword=non+benzenoid+aromatic+compounds+pdf
    • http://files.preciselyhow.org/uploads/1/3/1/6/131606407/190b7eef459.pdf
    • http://daguru.jolipbooth.com/uploads/1/3/0/9/130969465/niwetuv.pdf
    • http://files.realmilklexington.com/uploads/1/3/0/8/130814605/6c02eb554cf.pdf
    • http://bimujifuz.bigislandghosttours.com/uploads/1/3/0/8/130873995/1304411c2.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/mukajim.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/zulozipijepo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0400/1443/files/qbd_analytical_method_development.pdf
    • https://cdn.shopify.com/s/files/1/0429/5557/1353/files/53870448652.pdf
    • https://cdn.shopify.com/s/files/1/0433/5943/6951/files/algorithm_design_manual_skiena_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/2403/9592/files/61385670423.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8913/files/xunagoxigasowatizil.pdf
    • https://cdn.shopify.com/s/files/1/0428/1732/3175/files/31257770219.pdf
    • https://cdn.shopify.com/s/files/1/0435/8488/0798/files/gafesugimaletapofumeveg.pdf
    • https://cdn.shopify.com/s/files/1/0431/2281/9233/files/1977_dodge_sportsman_rv_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/1707/5868/files/32704919140.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6053/files/13397206489.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_off00007d7d.bin
41dffcdca2cfc30addec49634d1f545a3587de3e0bb9026799f6599b7e6f48d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D7D 5428 bytes
font_01_sfnt_off00008fe8.bin
fcbb6b4542bfec597502394a4201fe55fa9154a8e556c2a9c5337c42cf5928ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FE8 10280 bytes

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