Malicious PDF — malware analysis report

Static analysis result for SHA-256 256586a4e815dee7…

MALICIOUS

PDF

52.9 KB Created: 2020-07-16 04:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 752a1f314fb4a73a4f7fc331069f6882 SHA-1: 17ea79b1a55c8d88a9e82433e9e8d5fcb6259202 SHA-256: 256586a4e815dee7c4362638b4a8ae90d14e0a9dff1abd624b341cf9a0c064ae
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, identified as a link farm, designed to redirect users to malicious infrastructure. The primary redirector URL is https://ttraff.ru/wb?keyword=basic%20comma%20rules%20pdf. The document body is heavily obfuscated and appears to be generated content, further supporting the malicious intent of a link farm. No scripts were extracted from this sample.

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/wb?keyword=basic%20comma%20rules%20pdf
    • http://files.harmonythatmatters.com/uploads/1/3/0/8/130813317/1786737.pdf
    • http://files.positively-mindful.com/uploads/1/3/0/9/130969616/sugerisuvibataxigoj.pdf
    • http://files.brianknightresearch.com/uploads/1/3/0/8/130873798/2719043.pdf
    • http://files.positively-mindful.com/upl
    • https://nuparenelofo.files.wordpress.com/2020/07/1651150785.pdf
    • https://pepifalako.files.wordpress.com/2020/07/kulukugowuvove.pdf
    • https://zapirad.files.wordpress.com/2020/07/62519442940.pdf
    • https://vizivalafis.files.wordpress.com/2020/07/viwaluzagoweveritiwosodo.pdf
    • https://gukubulori.files.wordpress.com/2020/06/81996272579.pdf
    • https://gavumafan.files.wordpress.com/2020/06/53563778070.pdf
    • https://solasuz.files.wordpress.com/2020/07/nixutimixirazutojolar.pdf
    • https://povodijagez.files.wordpress.com/2020/06/48573688918.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/kilugekaf.pdf
    • https://cdn.shopify.com/s/files/1/0434/9899/5864/files/81034778123.pdf
    • https://cdn.shopify.com/s/files/1/0432/3203/4980/files/902083673.pdf
    • https://cdn.shopify.com/s/files/1/0430/2385/9873/files/fosuxepa.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/redapilufir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1662/6082/files/tikulimuxixakujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4740/3168/files/ruzikik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/nimususobejuxiniji.pdf
    • https://cdn.shopify.com/s/files/1/0434/6953/7432/files/51832649514.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/rapizew.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_off00009075.bin
828ea41647a999b742ca3ec7d2855fd7f287c4163d192b6da07d299daaebeb25
pdf-font-stream PDF embedded font (sfnt) at offset 0x9075 5048 bytes
font_01_sfnt_off0000a192.bin
2912b367369b2d9edb1a606ab8dd46e43bc07c2978b308d377cb3af79af7d66c
pdf-font-stream PDF embedded font (sfnt) at offset 0xA192 10852 bytes