Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5834b2079972746…

MALICIOUS

PDF

44.8 KB Created: 2020-08-30 19:50:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a77e6cef056bd7fd990fe64ae459f26f SHA-1: ee51532fb4258e211b3b9a189e09d7e84528c111 SHA-256: d5834b207997274674a70a5b302afdd3fa85ccc706b9ec97fd001a60aef678a1
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, with numerous embedded URLs. One prominent URL, 'https://ttraff.ru/wix?keyword=laboratory+manual+in+physical+geolog', is identified as a malicious redirector. The ML classifier strongly indicates maliciousness, and the presence of a link farm suggests an attempt to lure users to malicious sites, likely for phishing or malware delivery.

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/wix?keyword=laboratory+manual+in+physical+geolog
    • https://static.usrfiles.com/ugd/cc089a_7506a5c49f4647bea63a6147b46b265e.pdf
    • https://static.usrfiles.com/ugd/dd4472_9c546780397a4c0e83e68504e0b9bf51.pdf
    • https://static.usrfiles.com/ugd/b8c837_b905e840e05e4104a64b7ce3b4252619.pdf
    • https://static.usrfiles.com/ugd/77d535_87b44edb94eb446989809f0bff0e955d.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/74984284972.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1207/files/43156082390.pdf
    • https://cdn.shopify.com/s/files/1/0436/9865/1289/files/dinuzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/rexroth_axial_piston_pump.pdf
    • https://static.usrfiles.com/ugd/b8c837_aeb44110d99648c3b79d8d75e65a9495.pdf
    • https://static.usrfiles.com/ugd/1b8612_a0d3fb07db964734be447931d42288a3.pdf
    • https://static.usrfiles.com/ugd/b8c837_3b5001339a95490ca08c62d4e3fbb7f8.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/xuguganarinevanevepen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/rutizalofomutep.pdf
    • https://cdn.shopify.com/s/files/1/0463/2444/9437/files/wixepokoniriwaramu.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_off000065f1.bin
5ee0742ffbf8d601a5913a93508bcd2e8eaa3ee421fdbfd52a8ae1bab84fdb0e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 5528 bytes
font_01_sfnt_off00007890.bin
9e2841448f213c4d018968e33ee37ba094d0b9ca0ae119c5cd443d587e637b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 15008 bytes

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