Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc65157836feee12…

MALICIOUS

PDF

54.2 KB Created: 2020-08-20 07:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bacdfe2438817dab0cc74029a448b425 SHA-1: 5917040a26aac22faedfb95bf8432a2416a19f75 SHA-256: cc65157836feee12a86c4206b32dfeb98824420e564e7bf1d07807d31714c3a2
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to Shopify domains, suggesting a link farm for SEO poisoning. One critical heuristic identifies a direct link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=breastscreen+australia+monitoring+report+2014-+15'. The document body, though heavily obfuscated, contains the same URL, reinforcing its malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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=breastscreen+australia+monitoring+report+2014-+15
    • http://files.llrcanineobedience.com/uploads/1/3/2/3/132303035/xizumadozas.pdf
    • http://vobesup.janiceragoart.com/uploads/1/3/1/4/131453177/aae07e8e.pdf
    • http://files.delytefulpapillons.com/uploads/1/3/1/4/131453943/tonuduj.pdf
    • http://files.darrellmatsumoto.com/uploads/1/3/0/8/130873839/nodun.pdf
    • https://cdn.shopify.com/s/files/1/0429/5317/9289/files/kebegam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9183/6566/files/endless_ocean_blue_world_aquarium_guide.pdf
    • https://cdn.shopify.com/s/files/1/0436/6984/8217/files/38717471180.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0430/7206/1591/files/6395241703.pdf
    • https://cdn.shopify.com/s/files/1/0435/5388/2280/files/ansioliticos_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/hades_star_mod_apk.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/juzevo.pdf
    • https://cdn.shopify.com/s/files/1/0436/0637/6611/files/red_lava_lamp.pdf
    • https://cdn.shopify.com/s/files/1/0429/3830/2627/files/minecraft_parkour_maps_for_xbox_one.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_off000093ee.bin
c330a6256b663a3c244fc32af297c88eacb332acdcc139a89463ff8ef37501dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93EE 5872 bytes
font_01_sfnt_off0000a7e6.bin
562b5ac7805a229a6db578b458d268953f630808806971ada20fbc16b3e93527		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E6 10668 bytes

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