Malicious PDF — malware analysis report

Static analysis result for SHA-256 5acba12a1721ff89…

MALICIOUS

PDF

42.0 KB Created: 2020-08-29 14:07:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa6c77343f8ee7fa2a32b6c827ccbccb SHA-1: 53789aa30f5aa3d045f777f6b1bea8f97ef93b52 SHA-256: 5acba12a1721ff894117cc5f67ea8f21815249d62d07fa1edd3a7e5dce4d5e9d
154 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a document body that attempts to disguise its malicious intent by referencing product specifications. The primary heuristic indicates the PDF links to known malicious redirector infrastructure, specifically `https://ttraff.club/wix?keyword=nike+vapor+pro+driver+specs`. This suggests the document is part of a phishing or scam campaign, likely delivered as a spearphishing attachment.

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.club/wix?keyword=nike+vapor+pro+driver+specs
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/affaa6_7a8d414ff2f343d9b63dc671d0f9dfa0.pdf
    • https://static.usrfiles.com/ugd/b8c837_879f671782e24293b1828d4ec565c091.pdf
    • https://static.usrfiles.com/ugd/b8c837_43deaa3efff0478aaac26c00240fc6a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4fac8b22f7e44a8093401ab03043d3a5.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/bovujadufijojusunab.pdf
    • https://cdn.shopify.com/s/files/1/0430/8615/1833/files/free_online_converter_to_excel_2020.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/significance_of_the_study_about_online_games_addiction.pdf
    • https://static.usrfiles.com/ugd/b8c837_18a7fe7089734bb1a7b8b4552ffa36cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf2fa4c5a9034155bfc4a019c88e5a6c.pdf
    • https://static.usrfiles.com/ugd/b8c837_efecfac215454b0e9be89bf658fd3c9b.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fc892b3cb714e0c94ce61acef817458.pdf
    • https://static.usrfiles.com/ugd/b8c837_f649b29c8daa4343b9c42aeb9ebec8ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_9e6c73a0db134c0095ad4887dd126290.pdf
    • https://static.usrfiles.com/ugd/b8c837_30fd54937558457bb69c065553ce4808.pdf
    • https://static.usrfiles.com/ugd/b8c837_b3d1e5b9c4dc424298829ba826c98630.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_off0000664f.bin
f6d5cbeef31d61542accfee5f3c0927722521a3ef9ba2625f58a4644ee38110e
pdf-font-stream PDF embedded font (sfnt) at offset 0x664F 5128 bytes
font_01_sfnt_off000077cf.bin
3f46a206905b97440d49e8daf652c4ad4f75b9cf00605f7e08c778bad8d6bc9a
pdf-font-stream PDF embedded font (sfnt) at offset 0x77CF 10420 bytes