Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf485cef110d9779…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 22:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c42868d47b190e51877b1b35a04d9e41 SHA-1: ae50829c105e57e47b89533009ade41e52e5db1b SHA-256: bf485cef110d9779242c510485e9fde94b2ff3397841fff38ffc06d1799ff74c
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, with a critical heuristic firing for a malicious redirector. The embedded URL 'https://ttraff.cc/pify?keyword=chicago+manual+of+style+cover+page+template' is identified as a malicious redirector, suggesting the document's primary purpose is to redirect users to malicious content. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm or SEO poisoning attempt to increase visibility and traffic to the malicious redirector.

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=chicago+manual+of+style+cover+page+template
    • http://luwumiko.aenderungschneiderei-musovic.com/uploads/1/3/2/7/132710624/9848757.pdf
    • http://files.sitebuilder.middletennesseeflyfishing.com/uploads/1/3/1/4/131483265/8dba26.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/74133662670.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/accelerated_hypertension.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/addition_to_10000_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0434/3863/7208/files/21657336920.pdf
    • https://cdn.shopify.com/s/files/1/0430/6819/4978/files/advantages_of_whistleblowing.pdf
    • https://cdn.shopify.com/s/files/1/0434/6406/5188/files/absorcion_intestinal_deficiente.pdf
    • https://cdn.shopify.com/s/files/1/0430/9444/2145/files/fimujano.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajotoliwafugesekediriw.pdf
    • https://cdn.shopify.com/s/files/1/0432/0899/9072/files/tutorial_audacity_bahasa_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0449/5199/4536/files/fonctionnement_carburateur_moto_4_temps.pdf
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/gta_5_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_off0000643a.bin
a7f704ab0f4ea805d6d3a15719d06f48ef21555a056af2b5e9eb55433e09c4ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643A 5496 bytes
font_01_sfnt_off000076d0.bin
f2b64d392c04a5d415a0e928b2528e10d7a39f8da58e0142c7c817d7f244c70e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76D0 9744 bytes

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