Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a58ce90df4a11c4…

MALICIOUS

PDF

45.7 KB Created: 2020-07-27 14:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c24a77ffb2e8ab683fd47143f48cc9c3 SHA-1: 6ff29487bb7a4c9699c2a660a05ad36867e058dc SHA-256: 2a58ce90df4a11c40728a679ab1678b968e91235862bf3a611c7a949152121b9
150 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to ttraff.ru. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, suggests a lure related to an 'Nvidia tesla p40 datasheet'. The primary attack vector appears to be social engineering via a malicious 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.ru/pify?keyword=nvidia+tesla+p40+datasheet
    • http://files.bobfritz.net/uploads/1/3/1/6/131606262/4e483cbc646c1.pdf
    • http://files.laurapowerdaviesartist.com/uploads/1/3/2/6/132695942/cad6080b6bb6f7.pdf
    • http://files.lacoachusa.com/uploads/1/3/0/7/130739126/4666746.pdf
    • http://files.community.jesstopia.org/uploads/1/3/0/8/130814225/1333368.pdf
    • http://files.cafehoppingstories.com/uploads/1/3/1/4/131454255/posivanidad-fabudakonumoga-pilosi.pdf
    • http://files.community.jesstopia
    • https://cdn.shopify.com/s/files/1/0430/6521/3089/files/nukel.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/58070474342.pdf
    • https://cdn.shopify.com/s/files/1/0434/1065/3338/files/50914790757.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/dotuwikebas.pdf
    • https://cdn.shopify.com/s/files/1/0428/7902/5318/files/56327953447.pdf
    • https://cdn.shopify.com/s/files/1/0435/1574/0312/files/nelodijaromud.pdf
    • https://cdn.shopify.com/s/files/1/0428/8957/6601/files/41242334662.pdf
    • https://cdn.shopify.com/s/files/1/0428/4802/6780/files/xenebugefifo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7738/6918/files/zovevirexomifezamowidivo.pdf
    • https://cdn.shopify.com/s/files/1/0435/6728/4387/files/jewiwujosiledolexidi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4606/7605/files/25177310965.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2732/files/69375314341.pdf
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/tenunimepipewuta.pdf
    • https://cdn.shopify.com/s/files/1/0430/4814/0949/files/24413841528.pdf
    • https://cdn.shopify.com/s/files/1/0440/7531/9448/files/2732858712.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_off00007506.bin
2bc0488f5410cfef41b5689cb0ee7c4c51510e1e07d6f53dc60d6133f406aafa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7506 4780 bytes
font_01_sfnt_off00008554.bin
695704d2d340852a8e60ce1c480f689a396653ec7b77640a7a7ec2c1d84f4f00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8554 10604 bytes

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