Malicious PDF — malware analysis report

Static analysis result for SHA-256 064e92fa08e88f34…

MALICIOUS

PDF

40.0 KB Created: 2020-08-05 17:35:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 687a6e86726c8a2ab8c22234cf1b8be5 SHA-1: 47f10d51bd9d888ada11d3bd7660bb2e372562d0 SHA-256: 064e92fa08e88f342199ba7952ee883a504c4dafd9888c5e0433cc55bc8b4133
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 URL 'https://ttraff.com/pify?keyword=mental+agility+test+pdf'. The ML classifier strongly indicated maliciousness, and the presence of numerous external links suggests a SEO-based spam campaign. No scripts were extracted, but the document body and heuristics point to a phishing or redirection attempt.

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=mental+agility+test+pdf
    • http://files.kathleenbrownpsychicmedium.com/uploads/1/3/0/7/130739190/5d9d7f8c349.pdf
    • http://files.staceykennellynester.com/uploads/1/3/1/3/131378993/mebipuvewut_fivit_gokiramoj_rawuno.pdf
    • http://files.ancientayurvedic.com/uploads/1/3/1/8/131856632/54e5f1ec99a9.pdf
    • http://files.shoptwothreefour.com/uploads/1/3/0/9/130969633/fugasiwelab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/2405/4429/files/wakowu.pdf
    • https://cdn.shopify.com/s/files/1/0435/8671/5805/files/rapumixogigulimezuwufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/musuvagexas.pdf
    • https://cdn.shopify.com/s/files/1/0428/4533/9814/files/4461837543.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/nesuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/zakinotavebiduwodizavosap.pdf
    • https://cdn.shopify.com/s/files/1/0430/9640/8218/files/xajezi.pdf
    • https://cdn.shopify.com/s/files/1/0436/5346/4214/files/15197734028.pdf
    • https://cdn.shopify.com/s/files/1/0437/7467/3057/files/zitono.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6578/files/itf_taekwondo_patterns.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_off00005f3b.bin
8e4d49fd29c61d1962fb51aaeb11aca7c800a8dfac481bd90d6116435e3e63c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3B 5220 bytes
font_01_sfnt_off00007130.bin
46b489adb5c133d63f460df21001cc4ab7af2f74577f780032bb72c0472f62a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7130 10044 bytes