Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da36da9fed51097…

MALICIOUS

PDF

36.3 KB Created: 2020-08-18 14:04:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a823b4cf6a2a21acb5d3515b69751eab SHA-1: 84dd188ebe6d3369c350f6a4c1114553c1a86a15 SHA-256: 1da36da9fed51097f4c114d263e64f8d18704882ac8e87c84ecf0b9c1f298838
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 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and a keyword related to hardware drivers, suggesting a lure. Additionally, a PDF link farm heuristic indicates the document is designed to host numerous external links, likely for SEO poisoning or to distribute malicious content. The ML classifier strongly flagged this PDF as malicious.

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=bios+hp+elitebook+8460p
    • http://rapedef.tracyeducatorsassociation.org/uploads/1/3/2/8/132816202/616428.pdf
    • http://files.stillpointatbeckside.com/uploads/1/3/2/6/132695213/pupidofisejebina.pdf
    • http://files.breathewithlauren.com/uploads/1/3/1/4/131437351/424db3.pdf
    • http://files.matakanacommunitygroup.org/uploads/1/3/1/4/131453370/bfaed5.pdf
    • https://cdn.shopify.com/s/files/1/0432/2361/3595/files/majokakasopumomeset.pdf
    • https://cdn.shopify.com/s/files/1/0437/8247/1837/files/94485262691.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2469/files/33780149595.pdf
    • https://cdn.shopify.com/s/files/1/0431/6043/6887/files/tofarurutora.pdf
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/renenudavijufefoposariva.pdf
    • https://cdn.shopify.com/s/files/1/0434/5282/5750/files/handbook_of_biologically_active_peptides_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9713/files/rufoda.pdf
    • https://cdn.shopify.com/s/files/1/0428/2328/6940/files/dofiripuredudovata.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_off000041ba.bin
acd39ea9a6ec981a6f64f5c8093fffa73e160ff0f92b5a1ec7d830f08c074c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41BA 5112 bytes
font_01_sfnt_off00005324.bin
7173bea8db163e70d4dc87f416f3a612b544e8b174c705de96b295a3e9815fcd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5324 10328 bytes
font_02_sfnt_off00007685.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7685 4324 bytes

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