Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc04ab1186fcd5ef…

MALICIOUS

PDF

49.5 KB Created: 2020-08-02 00:48:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2548c301b40d3fcc39ae8eb26bb1084 SHA-1: 9c5a1aa5a329ed3ef175fc8db2a8e75e8bb17a31 SHA-256: fc04ab1186fcd5eff71bdc843d369393979ddd293c92aa0ea697a53f43288558
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text referencing "Mcgraw hill connect answers" and includes the malicious URL. This suggests a phishing or scam attempt to redirect users to malicious infrastructure.

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=mcgraw+hill+connect+answers
    • http://files.asavorytable.com/uploads/1/3/1/3/131397946/d4e6a80e68432c.pdf
    • http://files.kamediacollection.com/uploads/1/3/0/7/130739835/mirelipuvejuket.pdf
    • http://files.nortonstphilippottery.co.uk/uploads/1/3/2/6/132681579/nagujotojumajagufoka.pdf
    • http://files.bilingualplanet.com/uploads/1/3/0/8/130814397/relexekulijugaj-wumaroguguzu-ruwupef-dapukiputon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4388/9058/files/31998169982.pdf
    • https://cdn.shopify.com/s/files/1/0431/5090/1402/files/68249587063.pdf
    • https://cdn.shopify.com/s/files/1/0434/2510/4028/files/fajofulaxuk.pdf
    • https://cdn.shopify.com/s/files/1/0440/8688/6552/files/vedovovokoxanadepigevugil.pdf
    • https://cdn.shopify.com/s/files/1/0434/1995/9454/files/11339023066.pdf
    • https://cdn.shopify.com/s/files/1/0430/4253/7629/files/nebifuwovezusorefeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/5618/5000/files/416072400.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/70003833705.pdf
    • https://cdn.shopify.com/s/files/1/0436/6155/7913/files/14499921442.pdf
    • https://cdn.shopify.com/s/files/1/0432/2738/1920/files/rabidowo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007417.bin
dd49b2aab05a5b6394a8b28fdf22e1c02d557b8c06ae681633ab8d3457baa096		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7417 4948 bytes
font_01_sfnt_off000084f0.bin
a13ae4aa49c65f1b66616de3c5f33993a209618078169f1aec2fb9bece6bef26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84F0 11148 bytes
font_02_sfnt_off0000aaf8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAAF8 4324 bytes

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