Malicious PDF — malware analysis report

Static analysis result for SHA-256 9422f2979b19907e…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 19:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdd62c8abebecffa17f0a105090c496b SHA-1: 546012c7f52a6e5b17205f1f33ebe75b7ee5dc1d SHA-256: 9422f2979b19907e64f644e123c50b8840b170d80dbe09b5c4fb7d41b15c2c0c
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, many of which point to domains associated with link farms and redirectors. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=heartbeat+bts+flute+sheet+music', which is flagged as malicious. This suggests the PDF is designed to redirect users to malicious content through a deceptive link farm.

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=heartbeat+bts+flute+sheet+music
    • http://kogesi.musicinthenineties.com/uploads/1/3/1/6/131636644/3504210.pdf
    • http://basar.dectfl.org/uploads/1/3/1/4/131437987/9267262.pdf
    • http://gerotiko.bhstomp.com/uploads/1/3/1/4/131407089/49eb003085c10.pdf
    • https://cdn.shopify.com/s/files/1/0437/1814/8261/files/lupabuguzaxagekovetosevot.pdf
    • https://cdn.shopify.com/s/files/1/0439/8268/4318/files/gomujil.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5174/files/sogozakefoxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1549/files/delolari.pdf
    • https://cdn.shopify.com/s/files/1/0437/6605/5063/files/24391788252.pdf
    • https://cdn.shopify.com/s/files/1/0433/4488/7966/files/cambridge_primary_curriculum.pdf
    • https://cdn.shopify.com/s/files/1/0429/5606/2876/files/59754266173.pdf
    • https://cdn.shopify.com/s/files/1/0433/1618/3205/files/tisepelidejabudixepadato.pdf
    • https://cdn.shopify.com/s/files/1/0434/2281/0268/files/zidetizunutubasiwexoveteb.pdf
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/24593384966.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/bodepowipinitelasu.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004603.bin
45e0f8828c64272d499c18f9e2112311b015622047a2d401efb6c4b36f1d194a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4603 3748 bytes
font_01_sfnt_off00005362.bin
53fad2ee2fc3192974ae15c85108ab235e52bd369702336357efda584e013df6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5362 5220 bytes
font_02_sfnt_off000064f6.bin
47766049bf17831d356415f869105f2357973684a48d1035b5ebaa8eb2808f56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F6 13708 bytes
font_03_sfnt_off00009073.bin
705cd36d9c2227ee052114be9604a9bf84eb8c2476a52f9da8c5a7759dbb33cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9073 16080 bytes

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