Malicious PDF — malware analysis report

Static analysis result for SHA-256 e836cfd268719423…

MALICIOUS

PDF

47.2 KB Created: 2020-08-13 22:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9a5eeee06c0b3266aefc6839a56b4299 SHA-1: 3c2eedbeddb8bb0f1361bc92aaa42ea7e5c89d8d SHA-256: e836cfd268719423ab5a1fa4ea5c9a24f16717668e25910bd7c8b9a1c72623ec
150 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a high density of embedded links, including a redirector to 'ttraff.com'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body is heavily obfuscated, but the link farm and redirector are strong indicators of malicious intent.

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.com/pify?keyword=tv+guide+gold+coast+qld+australia
    • http://files.spoton-marketing.com/uploads/1/3/0/7/130776363/magabefo.pdf
    • http://files.thebeachcompanysc.com/uploads/1/3/0/9/130969735/5369831.pdf
    • http://files.texasshowcasecircuit.com/uploads/1/3/0/7/130739746/dfde2aa2169a2b1.pdf
    • http://files.amyannaart.com/uploads/1/3/1/4/131438268/46114.pdf
    • http://files.ruthdellinger.com/uploads/1/3/1/4/131438379/9615385.pdf
    • https://cdn.shopify.com/s/files/1/0434/6842/3334/files/mechanism_of_cell_differentiation.pdf
    • https://cdn.shopify.com/s/files/1/0434/0560/7062/files/bubezevude.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/61529005949.pdf
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/91814695687.pdf
    • https://cdn.shopify.com/s/files/1/0447/4735/8362/files/the_hateful_eight_script.pdf
    • https://cdn.shopify.com/s/files/1/0434/0862/1735/files/zojizotuwumowinanenape.pdf
    • https://cdn.shopify.com/s/files/1/0440/3265/5525/files/deep_learning_with_python_jason_brownlee.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/lisevuned.pdf
    • https://cdn.shopify.com/s/files/1/0430/3529/5905/files/sql_developer_formatter_not_working.pdf
    • https://cdn.shopify.com/s/files/1/0436/8970/5625/files/sukusu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/53860334800.pdf
    • https://cdn.shopify.com/s/files/1/0436/2174/4803/files/bikirevokogopetokebexelus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7428/9813/files/86284796215.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_off00007a15.bin
bb2bc4d22b2130d8c6851376161c44f2d7b78ac59713b9b1b064ca5d0eec479f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A15 5240 bytes
font_01_sfnt_off00008bef.bin
960cd316a49a71826f35fc31ee803a9ac4b490b51e8d175fc9c4089dabfbdc51
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BEF 10512 bytes