Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b668eb4156850b…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 22:29:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a76dfb43d69ef02043dfe8e48bb9e6cb SHA-1: fa71b0e93a082c6abf4b12eb630b968915dfb7ff SHA-256: a2b668eb4156850b2eed511cda46a00e8fcab94f681f60a7ba6657a1450a8a9a
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a question about upgrading to Windows 10. The document body and heuristics indicate a lure to this malicious URL. The presence of numerous benign-looking PDF links hosted on Shopify suggests a link farm tactic to obscure the malicious destination.

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/wix?keyword=is+it+worth+upgrading+to+windows+10
    • https://cdn.shopify.com/s/files/1/0438/3378/6518/files/banatoveramam.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/gufukumukamumerovekaja.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/brown_bear_brown_bear_colouring_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/3588/5725/files/66579685070.pdf
    • https://cdn.shopify.com/s/files/1/0431/1829/7245/files/88929972534.pdf
    • https://cdn.shopify.com/s/files/1/0434/3981/6861/files/penizepufiga.pdf
    • https://cdn.shopify.com/s/files/1/0446/9909/1098/files/58996195842.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89349082521.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/pictionary_game_cards.pdf
    • https://cdn.shopify.com/s/files/1/0432/4484/7261/files/ch_play_cho_laptop.pdf
    • https://cdn.shopify.com/s/files/1/0438/9906/0392/files/kisopusametujenidebuxuse.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/1126499386.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jepomosojavadoji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/paxotaxazojulilinitulo.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_off0000662b.bin
f2d9f956c81d3b1bdb146cc8738cb568807365ab4a121e535a45d7aa0ea90032		 pdf-font-stream PDF embedded font (sfnt) at offset 0x662B 5412 bytes
font_01_sfnt_off00007897.bin
74e7d088f3157d073e7ebfc4d9f2c5a53965b16920daf7f6d1f82a785bf1a597		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7897 10476 bytes

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