Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a76d556742555a…

MALICIOUS

PDF

54.9 KB Created: 2020-08-06 14:43:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93249e7dc7c2d334333e0202bc438f94 SHA-1: 11b271afb537eb3cc82fdc69115bb1d9597ba98c SHA-256: 29a76d556742555ab4428610ecf6cc7247ebd6251492f60a3ddef5cf414b3a69
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=bronchiectasis+guidelines+pdf', which is designed to lead users to malicious sites. Another critical heuristic identifies a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content through numerous links. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF 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=bronchiectasis+guidelines+pdf
    • http://zapitutaj.darevs.com/uploads/1/3/1/0/131070872/tiseseva-wevebusataporaf-bakel-jozilalixivuzek.pdf
    • http://files.faniehose.com/uploads/1/3/1/4/131483307/nilovofilup.pdf
    • http://tipad.specialeducation360x.info/uploads/1/3/1/3/131383613/kalat.pdf
    • http://files.paramountbuilders.co.uk/uploads/1/3/1/1/131164520/gotunexusibazo.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/leluguwajefufexogo.pdf
    • https://cdn.shopify.com/s/files/1/0435/3346/7807/files/wukeluworam.pdf
    • https://cdn.shopify.com/s/files/1/0434/2346/5623/files/dujitup.pdf
    • https://cdn.shopify.com/s/files/1/0432/5838/0446/files/jukuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/16279094295.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/93942315118.pdf
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/65844776318.pdf
    • https://cdn.shopify.com/s/files/1/0437/9371/1265/files/the_wizard_of_oz_1982.pdf
    • https://cdn.shopify.com/s/files/1/0435/0243/6518/files/fesojego.pdf
    • https://cdn.shopify.com/s/files/1/0433/7297/0133/files/lumabi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2608/7064/files/shapes_in_gimp.pdf
    • https://cdn.shopify.com/s/files/1/0432/5939/6254/files/36530483174.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_off000093a0.bin
c3962553d9c5dc777157c85c78b36719908ffa68dbfc057963caad5053ead843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93A0 5468 bytes
font_01_sfnt_off0000a634.bin
1f802e10098c998fd327b76823de1ca6c0a9f187371752b788cbaab14c228601		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA634 12648 bytes

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