Malicious PDF — malware analysis report

Static analysis result for SHA-256 91af2b9fc8dfd361…

MALICIOUS

PDF

39.2 KB Created: 2020-08-18 19:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 862313ce0bd7e5c4d396c0561200d3a2 SHA-1: 299dcd7f9c60eecb736a4e32b8f841537863eb8f SHA-256: 91af2b9fc8dfd361e31e987fabd0264c9553bb763cb66635a6957799ee644b6f
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a lure related to a 'Bangladesh passport reissue form' and includes a critical heuristic firing for a malicious redirector link. This link, 'https://ttraff.ru/pify?keyword=bangladesh+passport+reissue+form+fill+up+sample', is designed to redirect users to malicious content. The document also exhibits characteristics of a link farm, with numerous embedded URLs, including one pointing to 'cdn.shopify.com' which is part of a larger set of generated SEO PDFs. The presence of these elements strongly suggests a phishing or social engineering attack aimed at delivering further malware.

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.
  • 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
  • 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.ru/pify?keyword=bangladesh+passport+reissue+form+fill+up+sample
    • http://rosenegol.graceaboundseducation.com/uploads/1/3/0/9/130969059/67a1df.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/1990/files/30351223063.pdf
    • https://cdn.shopify.com/s/files/1/0429/1677/4054/files/77677208666.pdf
    • https://cdn.shopify.com/s/files/1/0433/3685/9813/files/vinawitelomoto.pdf
    • https://cdn.shopify.com/s/files/1/0439/1626/3592/files/xizukabiloroketakikow.pdf
    • https://cdn.shopify.com/s/files/1/0436/0654/0445/files/james_blake_assume_form_tracklist.pdf
    • https://cdn.shopify.com/s/files/1/0431/7564/1247/files/pufimusukimoke.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/jusugotuwuzakozemez.pdf
    • https://cdn.shopify.com/s/files/1/0427/6604/1244/files/33277682297.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ab.bin
f6462f1ab64fd80569e68ea20ea2f931638ac11e9d7feabe74570a0ad55b9053		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59AB 5504 bytes
font_01_sfnt_off00006c35.bin
b8c2d6b03f180be778124518a7e70a700eb20ddb8afd3c6d8d1e496e8e9331b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 10584 bytes

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