Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc95310034a69d29…

MALICIOUS

PDF

46.3 KB Created: 2020-07-29 23:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af93245078df4cf44497aa3c7f39ddf4 SHA-1: 07dc5587ff61d2de22ec44472314ec11b258bbf5 SHA-256: fc95310034a69d29ed5e299e5e391785f6cc8a5213127ab8fe68327f60216eea
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. Additionally, it exhibits a PDF link farm heuristic, with numerous links hosted on Shopify and other domains, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to 'making beer at home pdf', likely a lure.

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=making+beer+at+home+pdf
    • http://files.insidenanaskitchen.com/uploads/1/3/0/7/130776592/2674530.pdf
    • http://files.tgu-greven.com/uploads/1/3/1/4/131452846/399716f336.pdf
    • http://files.suisekirocks.com/uploads/1/3/0/8/130874110/1ff41923.pdf
    • http://files.rusticcraftsandcalligraphy.com/uploads/1/3/2/7/132712080/pijedu.pdf
    • http://files.acupunctureandnaturopathicclinic.com/uploads/1/3/2/8/132814355/wuditojogereditowole.pdf
    • https://cdn.shopify.com/s/files/1/0435/9228/6363/files/liderisugubuj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7240/6179/files/39270325295.pdf
    • https://cdn.shopify.com/s/files/1/0429/3971/1655/files/29412633578.pdf
    • https://cdn.shopify.com/s/files/1/0434/7274/8709/files/55695772267.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xezunegudowafosixezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4333/files/wipituve.pdf
    • https://cdn.shopify.com/s/files/1/0436/4324/0606/files/puxagomekoso.pdf
    • https://cdn.shopify.com/s/files/1/0436/9632/4761/files/fiwifuboxuwubesaxepokul.pdf
    • https://cdn.shopify.com/s/files/1/0434/8549/5453/files/48675025346.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/mojagumanebad.pdf
    • https://cdn.shopify.com/s/files/1/0430/0642/7299/files/5887821695.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/karamivudidupazal.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_off0000784d.bin
8461022c4aaa791258c62dcc67661edb143ea26bd43e6e6d6eefbb7fb9c898f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x784D 5244 bytes
font_01_sfnt_off000089ee.bin
125027aa26c92adaa456add93bae6838019fb5706d59a788b104741b4257edc8
pdf-font-stream PDF embedded font (sfnt) at offset 0x89EE 10028 bytes