Malicious PDF — malware analysis report

Static analysis result for SHA-256 91815f4c0ac06778…

MALICIOUS

PDF

76.1 KB Created: 2020-08-02 21:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87a5db36cdec5a10ef29ce22335f3f93 SHA-1: bf62abc2697fd9114ef9a8e7ecb9b9c3c4fd5bd2 SHA-256: 91815f4c0ac06778bd5b17eedbab63525fd86858b609123227eea3fb4a7872fc
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains text fragments that appear to be related to YouTube watch queues, suggesting a social engineering lure. 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.com/pify?keyword=yt+www+watchqueue+loadthumbnails
    • http://files.wrkimages.com/uploads/1/3/1/3/131380641/vavabuvumipe_kiwegovewulogud_xoruvuwix.pdf
    • http://files.shetlanddesigner.com/uploads/1/3/1/4/131438501/a0eb149f2871.pdf
    • http://files.chiarracjoseph.net/uploads/1/3/1/3/131398497/8006227.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6787/files/63983829469.pdf
    • https://cdn.shopify.com/s/files/1/0430/7664/9124/files/2015_rent_certificate.pdf
    • https://cdn.shopify.com/s/files/1/0432/5857/7046/files/palakipelador.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/kebexiwowalumipofitetaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7552/files/filetupanitarigotaz.pdf
    • https://cdn.shopify.com/s/files/1/0438/3893/1109/files/27395046739.pdf
    • https://cdn.shopify.com/s/files/1/0431/3546/7669/files/rujobesuzewuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/3937/5012/files/xirurufisevosibibub.pdf
    • https://cdn.shopify.com/s/files/1/0428/2351/6323/files/dugikufiguja.pdf
    • https://cdn.shopify.com/s/files/1/0432/4546/9858/files/22339928424.pdf
    • https://cdn.shopify.com/s/files/1/0431/0971/2033/files/how_to_mirror_an_object_in_maya.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/legub.pdf
    • https://cdn.shopify.com/s/files/1/0429/2041/1303/files/malinokoregotatag.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_off0000da3a.bin
dd38bf3acb820ce3f243b3772e81ac852fbcd8db6c69b7da4d0b266c557ff541		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDA3A 5404 bytes
font_01_sfnt_off0000ec84.bin
46797db5d30cdb3facee3f90a4e242e919c5cb161e46273df4a480be22147559		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC84 17608 bytes

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