Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ad07d84452c84f6…

MALICIOUS

PDF

37.5 KB Created: 2020-08-31 15:49:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c651f4eb047d2b4e65901d547372a8c SHA-1: 64b856de933666bd0bf0c0e48d6cdda595a4f067 SHA-256: 1ad07d84452c84f6238b7579cdbc1314824635f0c137af17a9c9d4a4b1eddd92
120 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though partially corrupted, suggests a lure related to an 'Intake interview report'. The PDF_SEO_LINK_FARM heuristic indicates a large number of links, many pointing to benign-looking PDFs hosted on static.usrfiles.com, but the primary malicious link is to ttraff.ru. No scripts were extracted, and the document body's corruption limits further analysis of the exact lure.

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/wix?keyword=intake+interview+report
    • https://static.usrfiles.com/ugd/6da380_64cf508f56c74839a80604cc93302af3.pdf
    • https://static.usrfiles.com/ugd/a838c0_6b8ad10195dd4e0689d3fb735c7ba1ad.pdf
    • https://static.usrfiles.com/ugd/3de8a6_53faa5e5a8f24a9190fa6f26bb12330b.pdf
    • https://static.usrfiles.com/ugd/b48b60_dccda61aa3824dae8c5ff0adcd3a2f6d.pdf
    • https://cdn.shopify.com/s/files/1/0433/1057/9865/files/bosefi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/novenotobefovukimutadop.pdf
    • https://cdn.shopify.com/s/files/1/0438/3247/5798/files/16821285184.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/14979555100.pdf
    • https://cdn.shopify.com/s/files/1/0435/3890/7288/files/9118137062.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/43808475153.pdf
    • https://cdn.shopify.com/s/files/1/0434/5757/7122/files/journal_marketing_research_articles.pdf
    • https://static.usrfiles.com/ugd/f523c3_dd90969fe5a44a47b8db1c28977e6a5f.pdf
    • https://static.usrfiles.com/ugd/df4650_a0a1567dc31940bc9dfd388effb32621.pdf
    • https://static.usrfiles.com/ugd/b8c837_8824fff3260844e684a91751329d327b.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_off0000572b.bin
eb6353f927eeaff0ee63a21fdbe79ad7e1318ea0cb1e70f94752ef9549a16a4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572B 4756 bytes
font_01_sfnt_off00006781.bin
5727eb979292138d0297ee56385e3cbb1da067dabeff4f3852c12dcbfb986bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 9988 bytes

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