Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbd9fa25dd3ad788…

MALICIOUS

PDF

41.3 KB Created: 2020-08-03 02:40:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 046f8e3fcd33ef9844f5152ed23ca0e3 SHA-1: 6752d435e8690b2a247033cf87ecf6a9a88d8ff6 SHA-256: dbd9fa25dd3ad78869ac240e93d1d2b288d49f6d8044801314571030878c3ff5
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified as a link farm. One of these links, https://ttraff.cc/pify?keyword=fate+character+sheet, points to a known malicious redirector. The presence of numerous links, many hosted on Shopify, suggests a tactic to distribute malicious content or phishing pages through a seemingly innocuous document. No scripts were extracted, and the document body was heavily obfuscated.

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=fate+character+sheet
    • http://files.aerotecwatches.com/uploads/1/3/1/3/131398076/mijiz.pdf
    • http://files.justfakeitbouquets.com/uploads/1/3/0/7/130738559/a6229d4801f.pdf
    • http://files.pinewoodnaturopathic.com/uploads/1/3/0/7/130739621/dawimurazepob.pdf
    • https://cdn.shopify.com/s/files/1/0438/9748/7512/files/66781092534.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/54240814464.pdf
    • https://cdn.shopify.com/s/files/1/0427/4293/9814/files/juwufimijupowujimifonaxim.pdf
    • https://cdn.shopify.com/s/files/1/0430/2598/9785/files/running_a_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9911/files/celebrate_recovery_lesson_4_sanity.pdf
    • https://cdn.shopify.com/s/files/1/0429/8797/8905/files/denon_avr_1612.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/30423311642.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/xujenamugemo.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/takopin.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/27789330001.pdf
    • https://cdn.shopify.com/s/files/1/0433/8227/6250/files/19029292499.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_off000063d4.bin
953b91cd022f523ecd4f8bf0eb839e983b5cd5388c5f14d3812857dc3f1f784b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 4808 bytes
font_01_sfnt_off00007425.bin
cc3c90b565524e8f8c49eb9f6e39aa19f116652a50c1fce55117cfc0e9877747		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7425 11100 bytes

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