Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b367924de7d6141…

MALICIOUS

PDF

43.9 KB Created: 2020-08-01 08:54:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82ee4651e63da1fb9ea16a282eba58c8 SHA-1: e5ef36841062fe1532351f8eec1608896a6e5ee5 SHA-256: 8b367924de7d61419cdb99aa158c5f58ee6fb0b8e86575cd826d5919893a1c43
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm containing numerous external PDF links. One of these links directs to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body contains obfuscated text and a reference to the redirector URL, suggesting an attempt to lure users to malicious 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=push+new+branch+to+github
    • http://files.highlandresilience.co.uk/uploads/1/3/1/1/131163878/vafilitugifafekoj.pdf
    • http://files.savefarthingworthgreen.org/uploads/1/3/0/8/130873840/9027896.pdf
    • http://files.envisiononeness.com/uploads/1/3/1/3/131397955/4393308.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/murach_java_programming_4th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/jinarotobufiladavoxalaka.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/81720443591.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0433/2313/0009/files/26540091055.pdf
    • https://cdn.shopify.com/s/files/1/0431/9805/4558/files/45061642708.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/lagoridosipibubupedebego.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/gelilu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/labuwonav.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/2007_honda_odyssey_repair_manual_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005d84.bin
b2da5baf41d63756b4215fb83abfc3c24998885c3488e0282246ab18080cb76f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D84 5144 bytes
font_01_sfnt_off00006f01.bin
e2258f4ab025890d0505ec9b5fc88b187d78c0d636fa8f23a42cb7ea36065938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 11152 bytes
font_02_sfnt_off000094d2.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94D2 4324 bytes

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