Malicious PDF — malware analysis report

Static analysis result for SHA-256 65d6b2ce950f4974…

MALICIOUS

PDF

50.0 KB Created: 2020-08-15 00:24:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1e6105a07e9290d2faceee2a4c992ad SHA-1: af44a2dc99d42d6d189bd9640287d05308ef8be2 SHA-256: 65d6b2ce950f49746702ca277e263c8b0ba4c038b5c85c22efbc9d512a907d2a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the payload. The document also features a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO manipulation tactic. The ML classifier strongly indicated maliciousness, and the presence of embedded URLs confirms the intent to redirect the user to potentially harmful content.

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/pify?keyword=self+awareness+book+pdf
    • http://redogikat.cbswimclub.org/uploads/1/3/1/4/131406665/894641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/40593542142.pdf
    • https://cdn.shopify.com/s/files/1/0435/1783/7467/files/32552606779.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7924/files/calculus_of_variations_with_applications_ewing.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3912/files/91128572386.pdf
    • https://cdn.shopify.com/s/files/1/0435/2576/7320/files/arcmap_10_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0455/9519/files/alphabet_matching_game_printable.pdf
    • https://cdn.shopify.com/s/files/1/0437/1175/8504/files/jumatabo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/chuyn_i_sang_hinh_nh.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/zejexovotesim.pdf
    • https://cdn.shopify.com/s/files/1/0436/4615/6960/files/tozivodipunogikuxadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8200/7199/files/que_es_crowdsourcing.pdf
    • https://cdn.shopify.com/s/files/1/0432/6414/7609/files/factores_psicologicos_de_la_sexualidad.pdf
    • https://cdn.shopify.com/s/files/1/0440/2541/3782/files/jopomizifurami.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008420.bin
d90332653968ce669d15d4b53a0c343d9a330e283022849d7ee35dad887809bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8420 5436 bytes
font_01_sfnt_off000096b0.bin
16b1549baec98602c0b390307cd540ccf862e436a6bb6d5219a8b9f51ddbbdc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B0 11136 bytes