Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0cbc395c0979a14…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 20:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01411da2d746aea69033087a97c008ad SHA-1: 09a477ea1991918dd39a5306ae9e13b9ed192f49 SHA-256: e0cbc395c0979a14d99249c1c4294d80795719481500c4ba65ed918c5c4405c3
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=cementing+oil+and+gas+pdf', is identified as a malicious redirector. The presence of a link farm and a malicious redirector suggests an attempt to either distribute further malicious content or engage in SEO manipulation for malicious purposes. No scripts were extracted, and the document body was heavily obfuscated.

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.cc/pify?keyword=cementing+oil+and+gas+pdf
    • http://files.zgultimate.com/uploads/1/3/2/8/132816042/1880339.pdf
    • http://files.nerinxhallspiritshop.org/uploads/1/3/1/8/131856234/kokefasolu-kumepi-wunax-difizagonirum.pdf
    • http://files.mymvmtpods.com/uploads/1/3/0/9/130969633/7930936.pdf
    • https://cdn.shopify.com/s/files/1/0430/8392/3609/files/how_to_change_to_word_on_macbook_air.pdf
    • https://cdn.shopify.com/s/files/1/0431/0024/2077/files/konisasalazatemife.pdf
    • https://cdn.shopify.com/s/files/1/0435/5971/4971/files/79163943095.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/potenawozesixis.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/35088821814.pdf
    • https://cdn.shopify.com/s/files/1/0431/6551/5933/files/kugiketajiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/electrolysis_of_water_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0427/8150/7740/files/casio_privia_px-_100.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/suramagufumaxuragozud.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_off0000723d.bin
b4e9f1c716a700ba5a908c2a288be775174c14af3d9ddc6f657e87edcb50d88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x723D 5168 bytes
font_01_sfnt_off000083c5.bin
3fb1aaf472b80337a7aef67a202ed08420ead97ad8eec0942ae1907403dba7db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C5 10616 bytes

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