Malicious PDF — malware analysis report

Static analysis result for SHA-256 b777565c82c7edb6…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 10:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05541e75a0f860f63f08cdf5e9fba1e0 SHA-1: 378c038e41fcd7badcb028a87857b8c854d46bde SHA-256: b777565c82c7edb6e7c546419380d6f14afcc12116167b27aeb5c155448079a1
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external PDF links, indicative of a link farm or SEO abuse. One of the embedded URLs, 'https://ttraff.cc/pify?keyword=diagnosis+and+treatment+of+diabetes+mellitus+pdf', is known to redirect to malicious infrastructure. The document body contains garbled text along with several URLs, further supporting the malicious nature of the file.

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=diagnosis+and+treatment+of+diabetes+mellitus+pdf
    • http://files.carynsbeautysolutions.com/uploads/1/3/1/8/131858044/xaturenog_sukarare_zedumojosoxitax.pdf
    • http://niraw.mccallsferryfarm.com/uploads/1/3/1/4/131438216/9294763.pdf
    • http://files.milltownmonitor.com/uploads/1/3/1/6/131637570/efe6da701b0.pdf
    • http://files.lindyjames-christenson.com/uploads/1/3/1/3/131379612/3953267.pdf
    • https://cdn.shopify.com/s/files/1/0427/8901/1612/files/rebagumegimalaxoginewafet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/35745656782.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8618/files/sat2_chemistry_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/vavadamelozupuropepazulow.pdf
    • https://cdn.shopify.com/s/files/1/0427/8052/4710/files/giwetapa.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/33522823355.pdf
    • https://cdn.shopify.com/s/files/1/0429/3401/0015/files/gotikoxivaxadugurebelasor.pdf
    • https://cdn.shopify.com/s/files/1/0428/4219/4083/files/lowopigafopevejenemibax.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/18292290055.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/44014826908.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/niwusimujarawidamefiziwuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6757/files/liwibanatajafelu.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_off000075b9.bin
b19b3fc3bca8fb4841383ba16ab4fba1fe69d898275fad0bcbaf08ff38c06000
pdf-font-stream PDF embedded font (sfnt) at offset 0x75B9 5500 bytes
font_01_sfnt_off00008857.bin
5b84a3cd2105d3eccfa74b84a6e1ede3c37cdf9fab01eb7df9781dc55c1b3fdf
pdf-font-stream PDF embedded font (sfnt) at offset 0x8857 10052 bytes