Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a76dc72837049f…

MALICIOUS

PDF

46.2 KB Created: 2020-08-17 01:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6d3f43d3e2e643c19114f2bf8386b6cb SHA-1: 20e774b20b8c1fd0fa8ef08bb5482baf228520b0 SHA-256: b9a76dc72837049f2cd99e9479906a547d54b3c43735693ccb4f5108e8f6508c
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, a technique often used to create link farms for SEO poisoning or to distribute malicious content. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=xenyx+1202+manual', is identified as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The file's purpose appears to be directing users to malicious sites through these links.

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=xenyx+1202+manual
    • http://kavisub.urconqueror.com/uploads/1/3/1/4/131438013/8483413.pdf
    • http://files.columbiaclefhangers.com/uploads/1/3/0/8/130874134/pesasotu.pdf
    • http://files.chiminisiberians.com/uploads/1/3/0/9/130968956/wawuzawibuweru_bopulus.pdf
    • http://files.sitcon.sk/uploads/1/3/0/7/130776891/mafas.pdf
    • https://cdn.shopify.com/s/files/1/0438/1392/9122/files/95611899069.pdf
    • https://cdn.shopify.com/s/files/1/0430/5806/9655/files/xexuwerofefuvo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/55688750663.pdf
    • https://cdn.shopify.com/s/files/1/0437/7001/9998/files/industrial_wastewater_treatment_patwardhan.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/lalinusofo.pdf
    • https://cdn.shopify.com/s/files/1/0430/2418/7555/files/livro_catecismo_da_igreja_catolica.pdf
    • https://cdn.shopify.com/s/files/1/0431/0256/8599/files/maziwa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3621/files/91135423340.pdf
    • https://cdn.shopify.com/s/files/1/0435/3956/2651/files/56833807426.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_off0000772b.bin
b89fc1284574a12cecd1acdc769a3580bc8539ad163566dc4b89e7e0035fc5e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 5032 bytes
font_01_sfnt_off00008849.bin
6ae207cf90b4938ffffccdce0e66a023023828d2d8a62423521f092e245bc193		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8849 10988 bytes

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