Malicious PDF — malware analysis report

Static analysis result for SHA-256 959789976af4f529…

MALICIOUS

PDF

54.8 KB Created: 2020-07-29 19:36:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 010e732c968698df40c8af969efa6411 SHA-1: c93288e37de61795d1ba39ff08be034f7a908807 SHA-256: 959789976af4f52945d7b668e50e0d54b6f1fb4138c6c8e5e4c0faca331b8366
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.cc/pify?keyword=build+my+life+sheet+music+pdf+free`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on `cdn.shopify.com`. The document body, though heavily obfuscated, contains text related to sheet music, suggesting a lure for users seeking free downloads. The ML classifier strongly supports the malicious nature of this PDF.

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=build+my+life+sheet+music+pdf+free
    • http://files.mountainhomeyogacenter.com/uploads/1/3/1/6/131637271/muxuvonu-kukepoxew-lixaginogupiw.pdf
    • http://files.brandingnetworks.com/uploads/1/3/0/9/130968968/5726406.pdf
    • http://files.gentlemansmaven.com/uploads/1/3/0/7/130738792/3c804fa1e39.pdf
    • http://files.valleyviewdoodles.com/uploads/1/3/2/6/132695543/sufetesaxofenem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7520/7322/files/7576518044.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/xaribukakujuwuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6353/2951/files/81934878543.pdf
    • https://cdn.shopify.com/s/files/1/0431/7341/3028/files/kipopazi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3486/1987/files/gedexixovelabaletodakivi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1243/1776/files/bobubisanotisiwo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0184/7708/files/lusixafapufutatuzilavu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/suneponejo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/dotod.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_off000084db.bin
03cc826cc741e6ee1712c9d077830c085738298451e62b818cc203a9609d5386		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84DB 5000 bytes
font_01_sfnt_off000095f0.bin
ee0e1d566eedfd815313a7c66be77458fce01c4abc7924bcba5e03a0d23cc239		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95F0 10044 bytes
font_02_sfnt_off0000b88b.bin
dbe3dd64dc066f428802739f18684eaf08c446fcda8cbe88d420f1ef9ee6b29b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB88B 16100 bytes

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