Malicious PDF — malware analysis report

Static analysis result for SHA-256 8746ebcefec348be…

MALICIOUS

PDF

39.2 KB Created: 2020-08-30 07:20:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 96b7f5b12899ba796d2bc9e21af426f3 SHA-1: c7233481ed7d26179552b8af677fb2fbcaebaddd SHA-256: 8746ebcefec348be6c15dc0da55016e5a8dd04d856ee8f4207228af29f8e73a8
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to Shopify domains. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be luring the user to click on the malicious URL, which is likely part of a phishing or malware distribution scheme.

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=o+restaurante+do+fim+do+universo
    • https://cdn.shopify.com/s/files/1/0434/3457/3991/files/queen_afua_heal_thyself.pdf
    • https://cdn.shopify.com/s/files/1/0430/2995/4721/files/pawuxadupifasedupuku.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/here_comes_the_hotstepper_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0429/3849/9235/files/wefilomaku.pdf
    • https://cdn.shopify.com/s/files/1/0435/2383/4024/files/65055095370.pdf
    • https://static.usrfiles.com/ugd/b8c837_669cf7f73d7d47788a173a295d4e4d50.pdf
    • https://static.usrfiles.com/ugd/cec570_8bcb4139e55341d19e1557a1501156e5.pdf
    • https://static.usrfiles.com/ugd/912de2_37487c6d5c0a48a6a0239e1cb90de376.pdf
    • https://static.usrfiles.com/ugd/f1d680_d265a8e48a6c487b9fa528eced5f87f8.pdf
    • https://static.usrfiles.com/ugd/6924eb_696d8c67d72c4a75b6546d773dd0af87.pdf
    • https://static.usrfiles.com/ugd/cbdbb6_4cfa0429a21549bc8afeb6fd66d39bfa.pdf
    • https://static.usrfiles.com/ugd/136d07_e53f6961e6f8490c904e457a1368fa13.pdf
    • https://static.usrfiles.com/ugd/2f3ac6_9683493d2e434bb58ae86e8cc4294e09.pdf
    • https://static.usrfiles.com/ugd/fe83c3_e79cd2435e4c41a4acacf232fb3dfa98.pdf
    • https://static.usrfiles.com/ugd/b8c837_b1c0bcdf44914913be75730a7deafb0c.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_off00005747.bin
2112a11f079511b47937daec90d0c1c70c40b85a3cc848198fd6f4cee719a353		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5747 5108 bytes
font_01_sfnt_off00006891.bin
a2b28f4ab573b5a4ed72e07fbd2a15dfad4e8d322751d43a18a748dbfe229dec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6891 12792 bytes

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