Malicious PDF — malware analysis report

Static analysis result for SHA-256 9dc9ddc492da6802…

MALICIOUS

PDF

45.1 KB Created: 2020-08-17 05:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9343b58c23f0d20cb6f0427f42bd4b05 SHA-1: 90ef03fb26bc20f748461f4c313fc3dd6e8d4c33 SHA-256: 9dc9ddc492da68021e71830a344fd17393e307414565e82c33c0c81d8a4da1cb
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with a critical heuristic identifying a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=spreadsheet+shape+in+visio'. The document body, though partially corrupted, also contains this URL and references a topic that could be used as a lure. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt to distribute malicious content.

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.cc/pify?keyword=spreadsheet+shape+in+visio
    • http://files.ofasr.com/uploads/1/3/2/7/132741429/letilotixufa.pdf
    • http://lekegeli.mjhscounseling.com/uploads/1/3/2/7/132740718/cbc2b66fe30c3.pdf
    • http://files.beaverfallscoffeeandtea.com/uploads/1/3/2/6/132681758/nijusikinimow.pdf
    • http://files.alliedonesolutions.com/uploads/1/3/0/7/130740536/6bc66b244f6.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/14671957378.pdf
    • https://cdn.shopify.com/s/files/1/0430/4565/0586/files/mojesimawudirabewowuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/8164/4697/files/list_of_pokemon_by_national_dex.pdf
    • https://cdn.shopify.com/s/files/1/0431/0011/1009/files/39637064860.pdf
    • https://cdn.shopify.com/s/files/1/0427/7056/3239/files/90925282209.pdf
    • https://cdn.shopify.com/s/files/1/0434/3624/5142/files/sudekumapapumogij.pdf
    • https://cdn.shopify.com/s/files/1/0431/7881/9735/files/28376610081.pdf
    • https://cdn.shopify.com/s/files/1/0433/3626/9983/files/pathological_anatomy_books.pdf
    • https://cdn.shopify.com/s/files/1/0437/7929/3338/files/lelanunemebovipalatifapi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6690/1148/files/10737239586.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_off00006cff.bin
a600fba79957dcb0ba3488969196baaf46d1e054584c7e66576361c93291c895		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CFF 5176 bytes
font_01_sfnt_off00007e97.bin
bbd705a4f553939fb64af00af7aabfb3c3df980cb538e68ee836c10e4619f458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E97 12840 bytes

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