Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4c0eb2f0ed2388d…

MALICIOUS

PDF

39.1 KB Created: 2020-08-14 22:07:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ba3da9e2ff5c9703a92fe19650c1e98 SHA-1: 6dc70f086c96112545d4754bc4a4e07133d9b003 SHA-256: e4c0eb2f0ed2388d6131d429df25d7a16a037399caa635661ea7bdc20a9df9de
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector infrastructure. The document body text, though partially corrupted, contains the string 'Speed for netflix' and the URL 'https://ttraff.cc/pify?keyword=speed+for+netflix', suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves redirecting the user to a malicious site via a link embedded within the PDF.

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=speed+for+netflix
    • http://files.maximevaporator.com/uploads/1/3/1/0/131070918/8872208.pdf
    • http://files.ewsevents.co.uk/uploads/1/3/2/7/132740338/panasime-xibokub.pdf
    • https://cdn.shopify.com/s/files/1/0428/1306/3327/files/50196348636.pdf
    • https://cdn.shopify.com/s/files/1/0428/3065/9751/files/tavibakugawefunikijobikom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6859/6123/files/14356488301.pdf
    • https://cdn.shopify.com/s/files/1/0431/8360/3876/files/16881150080.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/wububeg.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1526/files/carcassonne_travel_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/5812/5207/files/convert_to_word_free_download_zamzar.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/29761496966.pdf
    • https://cdn.shopify.com/s/files/1/0431/5149/1233/files/bevor.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/how_to_install_act.pdf
    • https://cdn.shopify.com/s/files/1/0430/9604/7783/files/autocad_3d_drawing_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/xukisowuwinigun.pdf
    • https://cdn.shopify.com/s/files/1/0433/9790/6589/files/63602007196.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/kijofipulub.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_off00005c42.bin
970acead6e3199f50373b03a301bf130f4d31a35932d3f8d3c149754b53e2448		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C42 4820 bytes
font_01_sfnt_off00006cb8.bin
8b0c312d02b0159249c5b3c6459a988e57eb60119b47fd547bd0966caf49e226		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB8 10376 bytes

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