Malicious PDF — malware analysis report

Static analysis result for SHA-256 5649a825c570571e…

MALICIOUS

PDF

41.2 KB Created: 2020-08-02 12:07:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ff62192dbff9f726e8b6cd6454c70755 SHA-1: 06d09bce332689ddae19ba1a0605f232063fa8df SHA-256: 5649a825c570571e62b32637595cb0fbe27c966c39b0d60c93fff05dcb273b0c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely intended to lead the user to a malicious site. The document body contains garbled text but also includes the URL 'https://ttraff.ru/pify?keyword=chatting+rooms+with+avatars', reinforcing the malicious intent. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute 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=chatting+rooms+with+avatars
    • http://files.supernawlaw.com/uploads/1/3/1/4/131453194/regugekutubage.pdf
    • http://files.lesswastemorecommunity.com.au/uploads/1/3/1/3/131383384/1590493.pdf
    • http://files.yarns-ewell-love.com/uploads/1/3/0/7/130775865/tebujebajexenelutado.pdf
    • http://files.manakilagigroup.com/uploads/1/3/1/4/131438188/nesixadirusajenipit.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/51645168312.pdf
    • https://cdn.shopify.com/s/files/1/0437/0730/2037/files/convert_to_vertex_form_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0435/7432/9499/files/65319800496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47184882359.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/22109102168.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6163/files/31574190120.pdf
    • https://cdn.shopify.com/s/files/1/0432/8692/1376/files/64647067826.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/19224789313.pdf
    • https://cdn.shopify.com/s/files/1/0437/7113/4106/files/da_form_1970.pdf
    • https://cdn.shopify.com/s/files/1/0432/0627/9332/files/sevirenijezuvoxurus.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3592/files/49596637482.pdf
    • https://cdn.shopify.com/s/files/1/0433/3882/5887/files/54457719845.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_off000064d1.bin
737f2d380db13ee39d6aa8c3fd0178d69e4c883440e02c7ebe67e168ab6688d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 5124 bytes
font_01_sfnt_off00007623.bin
0b10083f4fa1b56152cc5aba9a920d70d011f861bf50f1ecaf1069e88368a431		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 9848 bytes

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