Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fb7f5fb96a42ef…

MALICIOUS

PDF

45.1 KB Created: 2020-08-30 22:04:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9cc379983f5415a99a1967656bbd4ef5 SHA-1: 2a0a883ba8ddc503074ddc283d5f89ec12fe9d3a SHA-256: f8fb7f5fb96a42ef1ec607f1970ecb20d3342a50069a0a8fa02132c2c1456d7b
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of embedded links, suggesting an SEO poisoning or link farm attack. The primary malicious URL identified is ttraff.ru, which is known for redirecting to malicious content. While no scripts were extracted, the sheer volume of links and the critical heuristic firings strongly indicate a malicious intent to lure users to harmful websites.

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=panasonic+sa+ht920+system+cable
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/47948794002.pdf
    • https://cdn.shopify.com/s/files/1/0440/7525/3910/files/invisible_math_rules.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/disadvantages_of_technology_in_communication.pdf
    • https://cdn.shopify.com/s/files/1/0438/1209/4109/files/brother_louie_line_dance.pdf
    • https://cdn.shopify.com/s/files/1/0440/7017/4870/files/v_s__phng_trong_visio.pdf
    • https://static.usrfiles.com/ugd/b8c837_383bdc5052fa4b84b995de28f0d029a0.pdf
    • https://static.usrfiles.com/ugd/e7e4a0_5cb3d70937a84f7b9530244da553be40.pdf
    • https://cdn.shopify.com/s/files/1/0438/2621/7120/files/movie_for_mobile_in_hd_quality.pdf
    • https://cdn.shopify.com/s/files/1/0433/3145/3081/files/2007_honda_vtx_1300.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_off00006659.bin
2ba2ee77a02c955bc1b519a51eca8029b60819d87c23bb4b54bc79273d20734a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6659 5616 bytes
font_01_sfnt_off00007943.bin
0897c7b76bb8804b1ec2ab7f09e54d777cd4f85369efc3040bbb5b3b0302bca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7943 15272 bytes

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