Malicious PDF — malware analysis report

Static analysis result for SHA-256 def3bb37df9176ec…

MALICIOUS

PDF

44.4 KB Created: 2020-08-28 14:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 672e485e21a654beb40d59638128446b SHA-1: bb09cedfcba58af9e094950238142c91e60b24de SHA-256: def3bb37df9176ecc1195744629f59083204ba0c6748707bd2b21610b607706b
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=central+oregon+rockhounding+map+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links hosted on Shopify, suggesting a link farm designed to lure users to potentially harmful content.

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/pify?keyword=central+oregon+rockhounding+map+pdf
    • http://files.signalmountaintravel.com/uploads/1/3/1/3/131382032/vonerijawi_mefaf.pdf
    • http://bilariwi.buttecollegebcea.org/uploads/1/3/2/6/132683165/kajuguwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7473/files/depebavunovegufuwikijakux.pdf
    • https://cdn.shopify.com/s/files/1/0437/3354/9205/files/lelexufovaliwevit.pdf
    • https://cdn.shopify.com/s/files/1/0431/0895/8362/files/chicken_chop_suey_nutritional_information.pdf
    • https://cdn.shopify.com/s/files/1/0431/3032/3095/files/96950784392.pdf
    • https://cdn.shopify.com/s/files/1/0434/5144/9496/files/wubamedudaziwinu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/fokiv.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/rumavexux.pdf
    • https://cdn.shopify.com/s/files/1/0428/6011/8175/files/79946976699.pdf
    • https://cdn.shopify.com/s/files/1/0435/1596/9688/files/90354525299.pdf
    • https://cdn.shopify.com/s/files/1/0433/2231/0811/files/70106209340.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/gubobesuvixilufoxunibodoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/fitgirlsguide_free_download.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_off00006f64.bin
c3d1566d8f7798cb1b471c3f17083956a51c7daab9df7e77c9e3cd8de163fb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F64 5360 bytes
font_01_sfnt_off00008170.bin
d2434d2f18d46cc1d8f3d97a755c1458e9d657e1afbf3e1e6cafd1209576a381		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8170 10588 bytes

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