Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8c5f908caca06c7…

MALICIOUS

PDF

44.3 KB Created: 2020-08-15 21:40:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9108c3c4d58d8d684fc188e2ba1bfc2 SHA-1: a7e4f77e491b79f1fc0ccde9750ad9145ed8d127 SHA-256: d8c5f908caca06c7f9e55f7e66812f211424d2bf04df3eac4d5ae14fe47252a5
152 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links, many of which point to PDF files hosted on Shopify. Crucially, one of the embedded links, https://ttraff.com/wb?keyword=black%20&%20decker%20nst2118%20manual, is identified as a known malicious redirector. This suggests the document is designed to lure users to malicious websites, potentially for phishing or malware distribution.

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.com/wb?keyword=black%20&%20decker%20nst2118%20manual
    • http://files.devonreiffer.com/uploads/1/3/0/8/130814717/zalutojajifanuv-meloperip-terar-beguruxamadad.pdf
    • https://cdn.shopify.com/s/files/1/0430/7327/4018/files/74750967178.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/inverse_of_3x3_matrix_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/8266/2553/files/73414432035.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sovir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8221/1735/files/video_converter_ultimate_crack_version_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/gcse_probability_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/nosogoxeteto.pdf
    • https://cdn.shopify.com/s/files/1/0435/0846/5828/files/60776719047.pdf
    • https://cdn.shopify.com/s/files/1/0431/2930/7293/files/cash_flow_statement_in_tally.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/49038292080.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_off00006dc7.bin
ea0291633f3873a46c959b38d9ffd07a80aae6d36c52ae391e3e3049a6dd5324
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DC7 4624 bytes
font_01_sfnt_off00007d89.bin
ff49b3f4b5eb8c439f11738ec555628b3e3a91b02770e190776df52db800f87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D89 11536 bytes