Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6f224a11955f1a2…

MALICIOUS

PDF

37.1 KB Created: 2020-08-15 06:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd66916b768006ab70a43cbe686470c SHA-1: 15a411a3bf3ba64c15726f23b68cc914392690d1 SHA-256: c6f224a11955f1a287d185d4583c488560270db39539c30fdafa3a147632feec
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by an ML classifier and contains a large number of embedded links. One critical heuristic indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=abc+radio+774+program+guide'. Another critical heuristic identified a PDF link farm, with many links pointing to Shopify domains, likely for SEO manipulation. The document body contains garbled text but also includes the malicious redirector URL and several Shopify URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=abc+radio+774+program+guide
    • http://files.delavalredstandardpoodles.net/uploads/1/3/0/9/130969989/11b9fc0.pdf
    • http://files.inspiringlibraries.com/uploads/1/3/1/4/131453111/5895370.pdf
    • http://limizuz.tcfa.org/uploads/1/3/1/6/131606027/xikawuni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2335/8358/files/merusejolewopesukure.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/aceptacion_social.pdf
    • https://cdn.shopify.com/s/files/1/0439/6980/6494/files/bipolar_disorder_treatment.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/longman_dictionary_of_contemporary_english_7th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/2794/5889/files/johnson_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0503/files/kolodoxara.pdf
    • https://cdn.shopify.com/s/files/1/0441/3010/7544/files/25316304896.pdf
    • https://cdn.shopify.com/s/files/1/0429/9902/1731/files/hermes_scarf_tying_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/47073544554.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_off0000523d.bin
985827280f2f6e432444ac770e1deb8ac82a562a2abcfbc2f75ed80a7658a96b
pdf-font-stream PDF embedded font (sfnt) at offset 0x523D 5480 bytes
font_01_sfnt_off000064ce.bin
068ebc558be7d43b4267be724fa1cdbd5fa176500cf8bb98b1caca8cea7a8489
pdf-font-stream PDF embedded font (sfnt) at offset 0x64CE 10180 bytes