Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec46d6e322577aef…

MALICIOUS

PDF

44.9 KB Created: 2020-08-14 16:10:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bc8dca87af4bb80284ead6b47c16ec1d SHA-1: 10b5aea2a5202c5985f617e04993164f5ef7e699 SHA-256: ec46d6e322577aefba8c1497413940387600b99d5b13b6cffa9b53964849fb9e
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to `https://ttraff.com/pify?keyword=hot+rolled+sheet+metal+thickness+tolerance`. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to benign Shopify domains but one critical link leads to the malicious redirector. The document body, though partially corrupted, contains the same keywords as the malicious URL, suggesting a lure to a fake technical document. 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=hot+rolled+sheet+metal+thickness+tolerance
    • http://files.chrisneohrunning.com/uploads/1/3/2/6/132681392/fobob.pdf
    • http://files.zollthai.com/uploads/1/3/0/7/130739475/855376.pdf
    • https://cdn.shopify.com/s/files/1/0431/8697/8984/files/mechanical_engineering_projects_for_high_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4683/files/calidad_total_y_productividad_3ra_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0431/0532/1109/files/27529465886.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/67312711733.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/72631943063.pdf
    • https://cdn.shopify.com/s/files/1/0432/0441/1556/files/basic_use_of_computer.pdf
    • https://cdn.shopify.com/s/files/1/0438/1586/2434/files/zuzuzerazidopimaloxov.pdf
    • https://cdn.shopify.com/s/files/1/0439/8484/7006/files/naruwadopalunapuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/0775/2866/files/tunefereluloralexejade.pdf
    • https://cdn.shopify.com/s/files/1/0432/3000/3355/files/96352486097.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/antenna_and_wave_propagation_tutorial.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_off000066cd.bin
22b29b7fa398b8fb0ea0bf245434d98dad2e30c3f7cfa6ff5f7bd723cfadfc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66CD 5204 bytes
font_01_sfnt_off00007853.bin
cebd422fe4994786ae0399885aaba51a91077b2aa4bbad091e47968a803c3a82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7853 14856 bytes

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