Malicious PDF — malware analysis report

Static analysis result for SHA-256 21b6be7f576ea76d…

MALICIOUS

PDF

46.2 KB Created: 2020-07-28 19:32:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c4215409ff911225a6a2ca8c8ec743c SHA-1: d1247bf0541fd2c917c71fce48ae74306a86a56f SHA-256: 21b6be7f576ea76d264b875102f5cae547b6f0b24fffcf5cb554d10c3d0c2a7a
140 Risk Score

Malware Insights

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

The PDF contains a lure related to a 'nationality checking service' and includes a link to a known malicious redirector. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs. The presence of a callback phishing lure further supports the malicious intent. The primary attack vector appears to be directing users to malicious infrastructure via embedded links.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=nationality+checking+service+birmingham+form
    • http://files.mx.catalinapacificunderground.com/uploads/1/3/1/4/131406337/wipuwazofope.pdf
    • http://files.pegenter.com/uploads/1/3/1/4/131453536/9074807.pdf
    • http://files.flambeauagzone.org/uploads/1/3/1/8/131871704/8275735.pdf
    • http://files.mrelisara.com/uploads/1/3/1/8/131871762/nafagija-rarifilamib-gezagew.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/pejebamapovap.pdf
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/xuwifobado.pdf
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/98465045403.pdf
    • https://cdn.shopify.com/s/files/1/0434/4083/2678/files/91282570889.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/xunofobodafawole.pdf
    • https://cdn.shopify.com/s/files/1/0428/6644/2406/files/42109658058.pdf
    • https://cdn.shopify.com/s/files/1/0430/2848/0157/files/saveraza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51191810805.pdf
    • https://cdn.shopify.com/s/files/1/0432/7905/7056/files/19234398032.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/
    • https://cdn.shopify.com/s/files/1/0434/4083

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007603.bin
25c8fd89fef578afd91826c1d04f846e2389fcba57eee7946b05bffe33313508		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7603 5416 bytes
font_01_sfnt_off0000884e.bin
9deaa26055e404e211a6290590b82d50d5bdf7bca5829a38420666114cf907ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 10272 bytes

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