Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3a22fd093948f08…

MALICIOUS

PDF

119.3 KB Created: 2020-07-29 16:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b005b4c4a4b4896f023617ef7d3ae4f8 SHA-1: 9671b4d9c0266ff87f0bd342e59c0db83a68a51e SHA-256: b3a22fd093948f085257f91359ec4b083dcad56d60c0f1f54681d18fb4ff51f5
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The primary malicious URL identified is a redirector, suggesting an attempt to obscure the final destination. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of numerous external links points to a delivery mechanism for further malicious content.

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=antimicrobial+drug+resistance+pdf
    • http://files.kentuckybaskets.org/uploads/1/3/1/1/131164204/zizidefunajoko.pdf
    • http://files.brittalinnanderson.com/uploads/1/3/0/8/130814674/27ec0e8c4.pdf
    • http://files.charlestonmanufacturingcenter.com/uploads/1/3/0/8/130814115/xakasiduvazog.pdf
    • https://cdn.shopify.com/s/files/1/0427/5847/1846/files/putavufexunekugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/4247/1064/files/47995758911.pdf
    • https://cdn.shopify.com/s/files/1/0430/6223/1201/files/mabuletukademoliwik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6737/5770/files/lofutezijawameruba.pdf
    • https://cdn.shopify.com/s/files/1/0429/0235/6127/files/nefogimabutilevivilikupa.pdf
    • https://cdn.shopify.com/s/files/1/0428/4504/4892/files/95635283718.pdf
    • https://cdn.shopify.com/s/files/1/0430/8959/2473/files/15544576283.pdf
    • https://cdn.shopify.com/s/files/1/0437/7736/0029/files/naruvanesonosufoza.pdf
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/kusubedepe.pdf
    • https://cdn.shopify.com/s/files/1/0439/6112/2974/files/51821392840.pdf
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/fufipipatulipotewoboto.pdf
    • https://cdn.shopify.com/s/files/1/0436/9822/5320/files/fopavumuw.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_off0001984e.bin
e46ae488301b75152b29d887b41822cc2452e6baef356cd36364b0b865899a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1984E 5488 bytes
font_01_sfnt_off0001aac8.bin
fba96a430eeca63c01564c03977f816abb77ec681da3c8a2beea1c057de551e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1AAC8 10772 bytes

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