Malicious PDF — malware analysis report

Static analysis result for SHA-256 987fd992f746f322…

MALICIOUS

PDF

42.6 KB Created: 2020-08-17 01:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7635dd53798f07ac54bf58070e00417 SHA-1: 133b515d37941c651b16c11f00be063750cdfb60 SHA-256: 987fd992f746f322cb096a52fe1c74ff30decada83cfb9c6b891495c42f0e075
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which points to ttraff.ru. This URL is presented to the user as a 'grams to kilograms conversion chart pdf'. The PDF also contains a large number of embedded links, many of which point to Shopify domains, but the primary malicious link is to ttraff.ru. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=grams+to+kilograms+conversion+chart+pdf
    • http://files.huntingdonbedandbreakfast.com/uploads/1/3/1/3/131381799/fac38.pdf
    • http://files.oakcreekfootball.com/uploads/1/3/1/3/131379828/f9a46bda83.pdf
    • http://zoxix.southbeacharts.org/uploads/1/3/2/6/132695399/digofufiragu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0134/7226/files/12748095925.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/gafirar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8542/2997/files/worked_into_shape_daily_answers.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/bloomberg_terminal_software.pdf
    • https://cdn.shopify.com/s/files/1/0436/8069/4437/files/dutujupixaguk.pdf
    • https://cdn.shopify.com/s/files/1/0431/6430/3522/files/rorasadejoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/networking_basics_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/jelumujenezufujoxeguluk.pdf
    • https://cdn.shopify.com/s/files/1/0435/8461/8653/files/28257726876.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/wuzudokewove.pdf
    • https://cdn.shopify.com/s/files/1/0428/5969/2198/files/peter_drucker_innovation_and_entrepreneurship_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/faxegereg.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_off00005fa1.bin
9911fccc3635326f4e1822f256551734dfff267fa5a095c9efd81543b2012e93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA1 5724 bytes
font_01_sfnt_off000072fe.bin
c1f4a566c46cba7f647b204ded2275684e9d2439ca47c5a910931b1fa984edb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72FE 12696 bytes

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