Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc7fa14617f87732…

MALICIOUS

PDF

51.6 KB Created: 2020-08-09 14:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1fc6f2448286e4ad5f20a8103872892 SHA-1: 20f32281912bbbd4a7c7f86c05f75e14aecbae2d SHA-256: dc7fa14617f877328deb887651596ef868b53cb7d1192c51a2e23af7e7d56d24
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding a large number of external URLs. One of these URLs, 'https://ttraff.com/pify?keyword=benihana+lunch+menu+pdf', is identified as a malicious redirector. The document's content appears to be obfuscated or corrupted, but the presence of numerous links, including the malicious one, strongly suggests an attempt to manipulate search engine results or redirect users to harmful content. 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=benihana+lunch+menu+pdf
    • http://files.ianglidden.com/uploads/1/3/1/4/131438641/5992166.pdf
    • http://files.cerialephotography.com/uploads/1/3/2/6/132681670/kumeze_sivesedubagimir_kumifesakadogu.pdf
    • http://files.tuckshopdancetheatre.org/uploads/1/3/1/8/131857402/kajalasutawonixeluxa.pdf
    • http://files.pvphsmusicboosters.com/uploads/1/3/1/3/131381006/2488594.pdf
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/51952462865.pdf
    • https://cdn.shopify.com/s/files/1/0436/4563/2665/files/the_billboard_book_of_top_40_hits_9th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/25593075172.pdf
    • https://cdn.shopify.com/s/files/1/0434/6055/9013/files/acidos_organicos_en_alimentos.pdf
    • https://cdn.shopify.com/s/files/1/0435/4496/9367/files/ceylon_history.pdf
    • https://cdn.shopify.com/s/files/1/0435/0646/6975/files/33865105721.pdf
    • https://cdn.shopify.com/s/files/1/0437/1913/1285/files/gotafapi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8264/5665/files/dukepepedakemusop.pdf
    • https://cdn.shopify.com/s/files/1/0433/6749/7880/files/rosilelafiwebonofakezib.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/bajaj_allianz_future_wealth_gain_brochure.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/janivagitasi.pdf
    • https://cdn.shopify.com/s/files/1/0455/6773/8021/files/artificial_neural_network_modelling.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_off00007f75.bin
b15225d22429ca868b36ed1a79defea90cd538e37664d9088f0af9862a765486
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F75 5172 bytes
font_01_sfnt_off000090ec.bin
0b4c298f29a610b9a47fa577b46e7c62ee279dc8816e48bcb2bea911910849bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x90EC 15412 bytes