Malicious PDF — malware analysis report

Static analysis result for SHA-256 37fdba96647659c3…

MALICIOUS

PDF

44.4 KB Created: 2020-07-31 02:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5044dfc02489adaa1de243248538fc7 SHA-1: fe9b30d23a2770187cb7e3c5f85cc082599c179c SHA-256: 37fdba96647659c3b6a3854d411c777cacea0805d24248d6b587bf1a20a1904d
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, identified as a link farm. One critical heuristic indicates a link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of its specific content beyond the presence of links.

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.com/pify?keyword=biomagnetismo+isaac+goiz+pdf
    • http://files.atlantaillinois.org/uploads/1/3/1/1/131163578/9873081.pdf
    • http://files.fitstudiolancaster.com/uploads/1/3/1/3/131379939/020a064.pdf
    • http://files.upcowildandscenic.com/uploads/1/3/0/8/130814205/154db9818a.pdf
    • http://files.twohugos.com/uploads/1/3/0/7/130738993/3e447d2c1b5e91.pdf
    • https://cdn.shopify.com/s/files/1/0431/9048/5150/files/zakufasabogovalelisi.pdf
    • https://cdn.shopify.com/s/files/1/0435/6777/5905/files/xuvegozas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7194/7423/files/kifuduzowimo.pdf
    • https://cdn.shopify.com/s/files/1/0434/0819/5738/files/texuroxeguxibefim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32867625585.pdf
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/witekivimosokejeximetubix.pdf
    • https://cdn.shopify.com/s/files/1/0435/7577/1304/files/12758375678.pdf
    • https://cdn.shopify.com/s/files/1/0434/0465/6797/files/regile.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/79157895469.pdf
    • https://cdn.shopify.com/s/files/1/0430/3316/5986/files/pimarewinalodupomoxetodi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2576/6312/files/fobelizaxo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/74000698316.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_off0000701c.bin
88eb23f62841c60dea8fe192cb405038f32f859be2295ccdb17e7d34b9dcf473		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701C 5232 bytes
font_01_sfnt_off000081d9.bin
d2c60eec3618e61b2c251659776fc1fcf36c6586400d7c7885fe32f2a46cbb99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81D9 10328 bytes

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