Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3dccab02f1085f…

MALICIOUS

PDF

64.1 KB Created: 2020-08-20 18:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3349afc138a70e123d12514e706d7e37 SHA-1: 52395d1249bdfcf7eb28f6ce7bde50d10e95f519 SHA-256: 5f3dccab02f1085fd33aaf7b9555abb0e09b99b7b22faae98ce4d4b7e0ec7187
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it is a malicious redirector and part of a link farm, specifically mentioning a 'payment redirection / bank-detail change lure'. The embedded URL `https://ttraff.cc/pify?keyword=beauregard+parish+sales+tax+form` is flagged as malicious. While no scripts were extracted, the document's structure and embedded links strongly suggest an attempt to lead the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/pify?keyword=beauregard+parish+sales+tax+form
    • http://vetexe.billiardspress.com/uploads/1/3/1/4/131408024/jizobogalilewidikux.pdf
    • http://files.cck-iuc.com/uploads/1/3/2/7/132712358/durejudojukoluzeja.pdf
    • http://files.gardenbedraised.com/uploads/1/3/2/6/132695530/dovurubikawadiguzon.pdf
    • http://files.konrn.com/uploads/1/3/0/8/130874563/foregude.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4398/6330/files/68713796931.pdf
    • https://cdn.shopify.com/s/files/1/0431/6204/2532/files/jalulom.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/2014_ford_escape_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/carpentry_workshop_practical.pdf
    • https://cdn.shopify.com/s/files/1/0434/4066/8838/files/cubase_6_torrents.pdf
    • https://cdn.shopify.com/s/files/1/0432/6231/2611/files/26044641342.pdf
    • https://cdn.shopify.com/s/files/1/0434/4171/7414/files/honda_civic_hatchback_1998.pdf
    • https://cdn.shopify.com/s/files/1/0445/3348/1636/files/business_environment_calicut_university.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_off0000bcff.bin
288c2ad4645c07d8c641534876c522a00469889d9a5157a0c0163f8799071ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCFF 5572 bytes
font_01_sfnt_off0000cfd5.bin
c8a5154d536c00a673bacc21a9b3695b9c9b5dbd3b2f1e99daaafd889f26d813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD5 10524 bytes

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