Malicious PDF — malware analysis report

Static analysis result for SHA-256 6312a7eb7af9f588…

MALICIOUS

PDF

35.3 KB Created: 2020-08-30 13:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b47135adceceaf2c30f76e6157649644 SHA-1: 8881aebc9a7d1f1ca3f9635bad08db4ec932b4d3 SHA-256: 6312a7eb7af9f5880dd28f1112b23b9627ab3f2be0ff90943216fd94048d108c
154 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The embedded URL https://ttraff.cc/wix?keyword=competition+dance+costumes+resale is a primary indicator of this malicious redirection. Although no scripts were explicitly extracted, the PDF structure and link farm suggest an attempt to exploit users through deceptive links, likely as part of a phishing or scam campaign.

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/wix?keyword=competition+dance+costumes+resale
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/5be868_29fde5d048e64133bd701f3005a7c5cd.pdf
    • https://static.usrfiles.com/ugd/b8c837_def380d5552e418d82c97d6d4a3e69fa.pdf
    • https://static.usrfiles.com/ugd/0df15e_ada3d32d2937410e88f01bde74f54399.pdf
    • https://static.usrfiles.com/ugd/b8c837_f1650010c74a4b21bfcd43e6d698b70b.pdf
    • https://static.usrfiles.com/ugd/4c1554_bb4dc61f2b7549f3b229c04ba93aa887.pdf
    • https://static.usrfiles.com/ugd/b8c837_14d5b98d8a524ed79a238b69e8ec879b.pdf
    • https://static.usrfiles.com/ugd/87a178_5374a920b7164b9092e5c0da21d1522b.pdf
    • https://static.usrfiles.com/ugd/b8c837_03fabe0c4f734b85b60c8473cbeac064.pdf
    • https://static.usrfiles.com/ugd/c836c3_cfa353c8fa2940f2bc4c52775c7b30d2.pdf
    • https://static.usrfiles.com/ugd/238140_cb9d1c0ddefc4d8883e8b453745145d7.pdf
    • https://static.usrfiles.com/ugd/f4de5e_1e3efbcc491b403c878bac70ae8dba03.pdf
    • https://static.usrfiles.com/ugd/aff7ca_d932dba6c128464fbdf5ccef1b8a8bf5.pdf
    • https://static.usrfiles.com/ugd/b8c837_477f3ffc5768402d8ab933cb0032aa9c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e96c397b3eb54d98b7a2182dfb21fd9c.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_off00004c73.bin
9e48d1ac55b915cc15056dbc0c1657efda891ec13d6e726d9e497344b911478b
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C73 5124 bytes
font_01_sfnt_off00005db9.bin
bfeeddcbaa27a3f8b3480539aca8403769b13ce8135605f08d4d903a1e2677ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 10324 bytes