Malicious PDF — malware analysis report

Static analysis result for SHA-256 812d822d7112abdf…

MALICIOUS

PDF

57.1 KB Created: 2020-08-30 13:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6689579edf501e10f76e2aa40579b38a SHA-1: 22c09c033496438f4a824cc292fd55e50959dea0 SHA-256: 812d822d7112abdf262ea0877e611d4e0095bed31a5f102f70722d4a60d6c66d
120 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, pointing to ttraff.ru. This URL is presented within the document body, disguised as a link to an 'athlean x workout routine pdf'. The document also contains a large number of embedded links, many pointing to static.usrfiles.com and cdn.shopify.com, which is indicative of a link farm. The primary malicious IOC is the redirector URL.

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=athlean+x+workout+routine+pdf
    • https://static.usrfiles.com/ugd/b8c837_5af70aa5c86a47dd94597060da276b02.pdf
    • https://static.usrfiles.com/ugd/18f527_7752936d6b6045c7beedaf89e80dfe42.pdf
    • https://static.usrfiles.com/ugd/9e41f0_8efd73226dac415eba8344ab95f6ef5e.pdf
    • https://static.usrfiles.com/ugd/b8c837_f4afe71ad9764b7da7651b4ceac5e679.pdf
    • https://static.usrfiles.com/ugd/b8c837_a9b238016fc24d2ca61a274b4c7a0ff0.pdf
    • https://cdn.shopify.com/s/files/1/0443/2026/0252/files/32369577163.pdf
    • https://cdn.shopify.com/s/files/1/0428/9966/9151/files/94290790614.pdf
    • https://cdn.shopify.com/s/files/1/0434/7327/2998/files/nomokizizopuzaweriruze.pdf
    • https://cdn.shopify.com/s/files/1/0435/1646/1211/files/44749416592.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/xonawotodapenenifum.pdf
    • https://static.usrfiles.com/ugd/b8c837_63fa5c06e79e4155b579388d06b9f5f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_3c241bf2bd904e6089d9dccdb7324562.pdf
    • https://cdn.shopify.com/s/files/1/0434/4463/3750/files/vuluniwaxokololo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5062/files/difference_between_adsorption_and_partition_chromatography.pdf
    • https://cdn.shopify.com/s/files/1/0430/3604/9571/files/baratza_encore_485_manual.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_off0000a35a.bin
3e8651c4d4360ce5271589abfa30f5df31db616225b536d235f9f00b0b1cc8b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA35A 5164 bytes
font_01_sfnt_off0000b4fa.bin
fb7763682afac0e34ec8a217ed724a38a516f5479a79d9dc6440de577b1e6a38		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB4FA 10224 bytes

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