Malicious PDF — malware analysis report

Static analysis result for SHA-256 285d76854b2307b8…

MALICIOUS

PDF

42.2 KB Created: 2020-08-26 02:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ae5e85d19981771916e2d21de8899e95 SHA-1: 5e257c1de31c1473d96697e6e23fa75c761c28c1 SHA-256: 285d76854b2307b8abd9c211e78ec0c22ab6d6a279412f2d190fafa5c203ff05
150 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to Shopify domains hosting other PDFs, forming a link farm. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.club/pify?keyword=substitute+for+gorgonzola'. This suggests the document's primary purpose is to direct users to malicious infrastructure, likely for further exploitation or credential harvesting. No scripts were extracted, and the document body was heavily obfuscated.

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.club/pify?keyword=substitute+for+gorgonzola
    • http://files.littlegreenjeep.com/uploads/1/3/0/7/130740207/30d53101217e00.pdf
    • https://cdn.shopify.com/s/files/1/0431/0627/1394/files/89743654936.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/rawajajuwekegipaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/1247/9382/files/gabofoxelujudapikatofe.pdf
    • https://cdn.shopify.com/s/files/1/0467/9968/3735/files/dofe_skills_assessors_report.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/myron_mixon_rib_rub_recipe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2689/files/cargador_portatil_sony_manual_de_instrucciones.pdf
    • https://cdn.shopify.com/s/files/1/0463/2517/0331/files/zetajoger.pdf
    • https://cdn.shopify.com/s/files/1/0428/8489/0790/files/careless_whisper_saxophone_notes.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nagexonulelaxefirulilona.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_off000067a4.bin
b66a197df073159e47634d16768a04213d82bf2107f3f36cb7d064e9c9641352		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67A4 5228 bytes
font_01_sfnt_off0000797e.bin
ab78587fde2d260659dd80fc5a033def5e0923876f454519ea9bfe2676b6d3b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797E 10336 bytes

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