Malicious PDF — malware analysis report

Static analysis result for SHA-256 979110ac36cdeb9d…

MALICIOUS

PDF

51.2 KB Created: 2020-08-01 04:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1f45688b5027020fb3d9848fa005b20 SHA-1: ab900bc78f268488303071f02d25f9a01daf45d5 SHA-256: 979110ac36cdeb9d7d37bca0e9a577674309cf55b58218f4af481582594cb98c
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=three+kingdoms%253A+resurrection+of+the+dragon+2008'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains references to 'Three kingdoms: resurrection of the dragon 2008' and the malicious URL, suggesting a lure to a potentially malicious download or content.

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.ru/pify?keyword=three+kingdoms%253A+resurrection+of+the+dragon+2008
    • http://files.tulleshed.net/uploads/1/3/1/3/131383553/masanazavodina.pdf
    • http://files.rockingcleatherandboutique.com/uploads/1/3/1/3/131383510/7375545.pdf
    • http://files.gavin-buckley.com/uploads/1/3/0/7/130776483/933009.pdf
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/sugobuzusotunaval.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/88387204091.pdf
    • https://cdn.shopify.com/s/files/1/0429/7061/1861/files/soxadodozemepalurazajeva.pdf
    • https://cdn.shopify.com/s/files/1/0432/4936/9252/files/7131213321.pdf
    • https://cdn.shopify.com/s/files/1/0430/8844/5604/files/61077501741.pdf
    • https://cdn.shopify.com/s/files/1/0440/2121/9493/files/12106715738.pdf
    • https://cdn.shopify.com/s/files/1/0435/1823/0688/files/mozafevujenamat.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/35745587684.pdf
    • https://cdn.shopify.com/s/files/1/0429/8113/0394/files/52956706539.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/90951070255.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/48675087501.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_off000086cb.bin
17bbac481c2e6531467c74e8bc8a189e0894b8830b99cb3002848ca1ac0eb002		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86CB 5936 bytes
font_01_sfnt_off00009ada.bin
9d12aa3fea7db3139cc67e32658108fd6501a1627a4f79509faaa2f096ad024f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9ADA 10704 bytes

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