Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64a18ee0a44a60f…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 17:59:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f5e4f9a653019f7efd91fb8f956c7e6 SHA-1: 7a11f6f6d6f0ec10b480063e1f1e1c2d9f2a6fc8 SHA-256: f64a18ee0a44a60fe54a24b7f241f87d475a91908da759d5692444ed7146a623
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a significant number of external links. One of these links, https://ttraff.ru/wix?keyword=calcitrate+davis+pdf, is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs, reinforcing the malicious intent. The primary attack pattern involves luring users into clicking these links, which likely lead 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=calcitrate+davis+pdf
    • https://static.usrfiles.com/ugd/99965f_00127dc0c53f40219a8e33c84e150c95.pdf
    • https://static.usrfiles.com/ugd/4b7290_71f67635059a4015b4ec79f8934ca718.pdf
    • https://static.usrfiles.com/ugd/d2cc1f_d3769632e7464b59906731effb1dc04d.pdf
    • https://static.usrfiles.com/ugd/b444d4_f2cd8bdae0ba472e85ce9e7b28b445a1.pdf
    • https://static.usrfiles.com/ugd/850f07_19568c07d5a84815a3ef2f2d069373e9.pdf
    • https://static.usrfiles.com/ugd/d01287_c1aa377d18fe4bde8381ddfb646f7c17.pdf
    • https://static.usrfiles.com/ugd/b8c837_84e7eea281714fa3a1c0a06a05a3401c.pdf
    • https://static.usrfiles.com/ugd/269bb8_36e928c3bb54461ea7a117f272852955.pdf
    • https://static.usrfiles.com/ugd/07ef24_c82a0167aff74aafbcddd619206ed474.pdf
    • https://cdn.shopify.com/s/files/1/0438/0708/0605/files/ginowipoxoruder.pdf
    • https://cdn.shopify.com/s/files/1/0437/5419/3047/files/beard_cut_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/8667/4088/files/a105_material_specification.pdf
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/68467880776.pdf
    • https://cdn.shopify.com/s/files/1/0446/0806/1603/files/libros_de_auditoria_financiera_gratis.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_off000064af.bin
89f3aef98c410f3d815179a3b8075fc299fc7fecfaf18d9089449f69ff41d4bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64AF 5116 bytes
font_01_sfnt_off0000762a.bin
e55055aaffd24b4cc084309c5d5e935eee18167b0be0b928856976132fdb9b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x762A 10252 bytes

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