Malicious PDF — malware analysis report

Static analysis result for SHA-256 e34deed918b9b4b4…

MALICIOUS

PDF

42.4 KB Created: 2020-08-20 19:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 04267dd21a3d638ee710d777324e6e2f SHA-1: b34388890dd1286a2b8e785fe4f847c2966ceb4d SHA-256: e34deed918b9b4b4d5ce9c35ea31a648165eb78797a6d1994782089f1d4f24f7
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL, https://ttraff.ru/pify?keyword=basic+cv+template+word, is designed to lure users into downloading further malicious content by masquerading as a CV template.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=basic+cv+template+word
    • http://befisuve.kdbug.com/uploads/1/3/0/7/130775735/8355214.pdf
    • http://xufax.inkonivory.ca/uploads/1/3/0/8/130873782/6620083.pdf
    • http://files.michellemorrisonwrites.com/uploads/1/3/1/3/131384575/9098fa9835ef474.pdf
    • https://cdn.shopify.com/s/files/1/0436/1935/2740/files/boundary_element_method_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/6133/7494/files/nekigasubogazubefug.pdf
    • https://cdn.shopify.com/s/files/1/0430/8054/8503/files/9623259556.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/74563259431.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/1775522968.pdf
    • https://cdn.shopify.com/s/files/1/0429/4954/2041/files/zuvokelubukijitik.pdf
    • https://cdn.shopify.com/s/files/1/0436/5336/5910/files/27579683144.pdf
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/kasofipiramexuka.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/wasenejabonefomixupete.pdf
    • https://cdn.shopify.com/s/files/1/0429/3463/2607/files/60365633958.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5687/files/94860893559.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7142/files/fujebeliwadimaxolu.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_off0000678f.bin
73ecc34b6afe6f666d77af34cf8a2f492050a52363c5c5b87fbe3137a8c79190		 pdf-font-stream PDF embedded font (sfnt) at offset 0x678F 5420 bytes
font_01_sfnt_off000079f1.bin
e4c1c99b977f1226f596c53a131d1ceddca0484dbbb612615bae4a8b510205a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79F1 10376 bytes

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