Malicious PDF — malware analysis report

Static analysis result for SHA-256 41c4cedff03220a3…

MALICIOUS

PDF

44.4 KB Created: 2020-08-02 11:17:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8837285a0982dcc9eadc6fd30ca0a8f1 SHA-1: 1969e08778fd7b02743fe3a715798f86aea8a0cd SHA-256: 41c4cedff03220a37ad8a389b0a76e8de6cb432595f590d984a2f790d3862ef8
120 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a large number of external links, a technique often used for SEO manipulation or to distribute further malicious content. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=bash+echo+newline', is flagged as a known malicious redirector. The document body contains obfuscated text and references to the tools used for its creation, but no direct script execution was observed.

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=bash+echo+newline
    • http://files.hypnosisforbalance.net/uploads/1/3/0/7/130775398/1916238.pdf
    • http://files.manuelamazzanti.com/uploads/1/3/0/8/130814475/2868738d.pdf
    • http://files.amandatsam.net/uploads/1/3/1/6/131636914/1126849.pdf
    • http://files.cateringbykatherine.com/uploads/1/3/1/1/131163601/fasolaxoxigep.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/63982680415.pdf
    • https://cdn.shopify.com/s/files/1/0430/2965/9797/files/97777576557.pdf
    • https://cdn.shopify.com/s/files/1/0432/1538/8840/files/34073146246.pdf
    • https://cdn.shopify.com/s/files/1/0430/8353/0407/files/penur.pdf
    • https://cdn.shopify.com/s/files/1/0436/5837/9417/files/32440503216.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/malaimalar_tamil_news.pdf
    • https://cdn.shopify.com/s/files/1/0427/4041/6678/files/10312338874.pdf
    • https://cdn.shopify.com/s/files/1/0428/8980/5980/files/77729221839.pdf
    • https://cdn.shopify.com/s/files/1/0430/2657/9610/files/jivumiwafesifitetof.pdf
    • https://cdn.shopify.com/s/files/1/0430/1396/3939/files/71956170575.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/navexumavokino.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/25618529858.pdf
    • https://cdn.shopify.com/s/files/1/0447/1295/1961/files/ffmpeg_m3u8_to_mp4.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_off00006ea7.bin
b18ec499ed16ca965d07a9471f4a55fe4656139dd2d27bea626f711cf41ee525		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA7 4932 bytes
font_01_sfnt_off00007f82.bin
ad468421b1edce5c44b74ca1f0041208d5c4fc66cf222568a733a34a0b1ab253		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F82 10912 bytes

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