Malicious PDF — malware analysis report

Static analysis result for SHA-256 b97a1f9b948a626d…

MALICIOUS

PDF

49.2 KB Created: 2020-09-01 12:41:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 236b30c845c6b3303352b4d48fcb2f2b SHA-1: 79fcb73d36ed77d302bf304ede16d345168f986b SHA-256: b97a1f9b948a626d6061fca132b17e2fc1dedb430ad8bb444458ef77c13424b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains hosting PDF files. The ML classifier strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to a malicious site via a deceptive link within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.com/wix?keyword=thematic+analysis+report+sample
    • https://cdn.shopify.com/s/files/1/0437/9715/1904/files/bouteflika_une_imposture_algrienne_mohamed_benchicou.pdf
    • https://cdn.shopify.com/s/files/1/0434/5479/1832/files/barmer_patrika_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/nogururugal.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/69834613376.pdf
    • https://cdn.shopify.com/s/files/1/0430/9562/1796/files/78132788049.pdf
    • https://cdn.shopify.com/s/files/1/0437/5642/1269/files/drop_table_mysql.pdf
    • https://cdn.shopify.com/s/files/1/0456/8357/2895/files/ambersil_ipa_solvent_safety_data_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0469/3249/2443/files/minecraft_windows_10_cracked.pdf
    • https://static.usrfiles.com/ugd/ac51ce_00f57ba89ca141b9bb5382b138cf597b.pdf
    • https://static.usrfiles.com/ugd/2f7815_b6bc906837c54c1da3980e502b192744.pdf
    • https://static.usrfiles.com/ugd/bb13a2_9b066b49126d46cf82e8d8dc607c1f62.pdf
    • https://static.usrfiles.com/ugd/b8c837_e1ae8f343bd748f196de2dd10a9b0603.pdf
    • https://static.usrfiles.com/ugd/b8c837_2f4f8c30bc434cc4970cbe52abca9738.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/lifotu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1402/files/pipeletujikodunetaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/1390/6333/files/biology_mcq_pdf_in_bengali.pdf
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/36786446310.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_off0000841b.bin
0b7875b95f72fd1ae6b8f0549b95c4677bf2b4cc28655d38927359875585083a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x841B 5224 bytes
font_01_sfnt_off000095b7.bin
d43da6d961d66681611727068b79b9f766935e1b212ace40f7f2b61dad7031b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95B7 10080 bytes

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