Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75b934053787627…

MALICIOUS

PDF

39.0 KB Created: 2020-08-30 11:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87416179ff9b837ec699fb58ec0b1fe5 SHA-1: 92c4bade52a243b1a47cdb64418559ef59fed2aa SHA-256: c75b934053787627fdad6172f04d8b33b398308f011e74e20a0f5d6cb0b4d20a
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'static.usrfiles.com' being a dominant host. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary purpose is to lure users to malicious sites.

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/wix?keyword=the+culinary+professional+study+guid
    • https://static.usrfiles.com/ugd/b8c837_c113b77178434174a2012ee1e812ed03.pdf
    • https://static.usrfiles.com/ugd/e1c37d_64f1ed4418a84cec8bea2df5b1824e58.pdf
    • https://static.usrfiles.com/ugd/b8c837_502f1399816e44929536504239af61e2.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/zezamamijulufik.pdf
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/avon_bottles_price_list.pdf
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/femusedawanoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/62150702854.pdf
    • https://cdn.shopify.com/s/files/1/0435/1705/1039/files/teatro_dresses_uk_stockists.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/78633689872.pdf
    • https://static.usrfiles.com/ugd/ca32a8_e81e1dddca4f4a489a284738ae828a33.pdf
    • https://static.usrfiles.com/ugd/b8c837_b2c3427f58f145edbda03a8c7c7d935a.pdf
    • https://static.usrfiles.com/ugd/b8c837_22753cedaa424edbbe5fa513a506f6e2.pdf
    • https://static.usrfiles.com/ugd/95089d_3f2e98126dff4f1288c9163b6ea34162.pdf
    • https://static.usrfiles.com/ugd/52b593_765341aafce2401b980f64483c27c604.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_off00005a6e.bin
e00cc8eacec30d956a512fa31c1af19b88b164292a82f92effdfc6d534ab50d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6E 5468 bytes
font_01_sfnt_off00006cfd.bin
ed81978665bec932e5a72076d3815ec2abfed3cab574479325f0bcf92439410e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFD 9896 bytes

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