Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6dba88d00e57583…

MALICIOUS

PDF

64.1 KB Created: 2020-07-30 00:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ffd76f17fcf9f5bf0d69d79f530619a4 SHA-1: 4364b155cbf157e444bbbafdff770c369a669b5c SHA-256: a6dba88d00e5758390fe28f529a0ca9a709e07d9db3410709b2a554fa06dc0e0
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, identified as a 'PDF SEO Link Farm'. One of these links, 'https://ttraff.cc/pify?keyword=standard+dimensions+of+building+components+pdf', points to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'Standard dimensions of building components pdf'. No scripts were extracted from this sample.

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=standard+dimensions+of+building+components+pdf
    • http://files.cranbrookmx.com/uploads/1/3/1/3/131383483/cd2b5b84caf.pdf
    • http://files.ballerzbulldogges.net/uploads/1/3/1/0/131070146/5275932.pdf
    • http://files.geopoliticaltribune.co.uk/uploads/1/3/0/9/130969873/luraxam.pdf
    • http://files.applauseacademyma.com/uploads/1/3/1/4/131483955/0bcf52f835f9.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/fozisu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27150836515.pdf
    • https://cdn.shopify.com/s/files/1/0431/5811/0363/files/74553818037.pdf
    • https://cdn.shopify.com/s/files/1/0439/1026/7035/files/24284154919.pdf
    • https://cdn.shopify.com/s/files/1/0430/8592/2466/files/tofadesukunuzegexisiwufi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7781/9802/files/30355997380.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.pdf
    • https://cdn.shopify.com/s/files/1/0431/5653/7505/files/wepedekarelediw.pdf
    • https://cdn.shopify.com/s/files/1/0434/5259/6374/files/bupupegufasuzekezajej.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0875/files/84039485845.pdf
    • https://cdn.shopify.com/s/files/1/0428/7044/0095/files/34880156660.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/1568204463.pdf
    • https://cdn.shopify.com/s/files/1/0431/8652/0224/files/5093264511.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_off0000bcb0.bin
16de567051939c739cb4867e4dc209b9674fd3d123539ff77b7827332428c17f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCB0 5600 bytes
font_01_sfnt_off0000cf97.bin
f3cf85a5539326b9371bbab9d3a43dfbfa83ec829df2e5cf23ec836a2a47be8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF97 10264 bytes

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