Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4d62b916115ed0f…

MALICIOUS

PDF

35.6 KB Created: 2020-08-17 06:00:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67e67272ad6e12e912e2620aa34aede6 SHA-1: 2443fba277fa6c85739431b835d2e872129e63f8 SHA-256: d4d62b916115ed0f2aa7a53929efe38f45ee38ee3fe0405720d2e1cfab8448c0
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, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is part of a link farm. The document body, though heavily obfuscated, contains the same malicious URL and references 'free colouring sheets lol dolls', suggesting a lure. The presence of numerous Shopify links, some confirmed benign and others unknown, indicates an attempt to blend malicious links with seemingly legitimate ones. The primary attack vector appears to be social engineering via a deceptive link.

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=free+colouring+sheets+lol+dolls
    • http://sowes.alankendallmusic.com/uploads/1/3/0/8/130814328/warakewesadetiximego.pdf
    • http://kinur.letterstolawyers.com/uploads/1/3/0/7/130775918/wanem_gokozedenadipo_jizudiluzo_kuwevewet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/96381745900.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/26127436208.pdf
    • https://cdn.shopify.com/s/files/1/0429/0707/4723/files/vaxazer.pdf
    • https://cdn.shopify.com/s/files/1/0433/7424/8101/files/57245697281.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/besatetaxivanenuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1195/6126/files/phylum_cnidaria_characteristics.pdf
    • https://cdn.shopify.com/s/files/1/0435/2134/3647/files/xemabu.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/corriente_pedagogica_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/glenn_vilppu_drawing_manual.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_off00004f4e.bin
822a256e3224291a82deb86c085ce3b860d48bf06865ece022c737417b46408a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4E 4944 bytes
font_01_sfnt_off00006011.bin
8edc4cae7c1e80cd41d44791654b4e8ee956f4c124affe709d71feec99d1f08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6011 10008 bytes

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