Malicious PDF — malware analysis report

Static analysis result for SHA-256 81786d2ccad6e76e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-17 09:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9ca4b1d05df1939b7415365484dba3b SHA-1: 0254aa39eafcb53f0fef76a06010e11a605000a9 SHA-256: 81786d2ccad6e76e1fdcbbfdc644213eddb3718928c0d1b9f482626371163fd2
140 Risk Score

Malware Insights

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

The PDF document contains embedded links that lead to a known malicious redirector, disguised as a 'cedars sinai maternity pre admission form'. The document also exhibits characteristics of a callback phishing lure, instructing the user to call a number in a billing or refund context. The presence of numerous external PDF links, many hosted on shopify.com, suggests a link farm intended to manipulate search engine results or distribute malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=cedars+sinai+maternity+pre+admission+form
    • http://files.thevoiceofhaltom.org/uploads/1/3/1/4/131438111/b58634.pdf
    • http://files.ninelivestwine.com/uploads/1/3/0/8/130874629/vezik_gunefitotokek.pdf
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/directional_hypothesis_example.pdf
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/jezozavogisinepigesidap.pdf
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/2682000070.pdf
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/jevido.pdf
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/52560898066.pdf
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/xinap.pdf
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/67226505341.pdf
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/gezoxowotixude.pdf
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/26290009291.pdf
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/printable_blank_monthly_calendar.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_off00005363.bin
5a766be9e485e9e44210b72edf39a0bafd37c58526eeb4c0e03d289e2edfd37d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5363 5160 bytes
font_01_sfnt_off000064e0.bin
5ec4ba7443b65a3b63a8d220c69d60ef93d333a2ce471ffbd7937a28408a27a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 9816 bytes

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