Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5992b462e94910b…

MALICIOUS

PDF

39.9 KB Created: 2020-08-01 07:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 018dc98df30b051bd32126cc511a2acf SHA-1: 5ba27356ceb125091cc44ecd83643e7a8d1720e1 SHA-256: f5992b462e94910bbd0e45bb2442f9010fca676aee97cf275460fe800ad78c0d
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=jquery+get+screen+width'. This link is presented within the document body, suggesting a social engineering lure to trick the user into clicking it. The PDF also contains a large number of embedded links to external PDFs, many hosted on Shopify, which is indicative of a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious.

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=jquery+get+screen+width
    • http://files.rlc-scottsdale.org/uploads/1/3/1/6/131636806/6945122.pdf
    • http://files.en.oslomamma.net/uploads/1/3/0/7/130776409/serope-juduzit-tefumefiwugote-fuvudatapum.pdf
    • http://files.rebeccasnutfree.com/uploads/1/3/2/6/132682281/subogunakareren-dagafowabilele-vavit-bururiduwemojez.pdf
    • http://files.loudoununited.org/uploads/1/3/2/7/132712451/kuladaboke_nikobinifexiw.pdf
    • https://cdn.shopify.com/s/files/1/0436/9914/2810/files/nekut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9793/9367/files/nejenezu.pdf
    • https://cdn.shopify.com/s/files/1/0438/7130/5896/files/16595155688.pdf
    • https://cdn.shopify.com/s/files/1/0432/7089/7824/files/dogiwabetejuli.pdf
    • https://cdn.shopify.com/s/files/1/0435/4244/6229/files/wufife.pdf
    • https://cdn.shopify.com/s/files/1/0431/6132/1634/files/pavafikupejofunotapudeni.pdf
    • https://cdn.shopify.com/s/files/1/0430/5872/5018/files/pawodibotota.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7674/files/farulidafazizer.pdf
    • https://cdn.shopify.com/s/files/1/0433/6150/1336/files/litogoputevuzamedowa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/87535745536.pdf
    • https://cdn.shopify.com/s/files/1/0430/8104/0033/files/83368073053.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_off00005b2d.bin
adfade2dbbe8a6be00a1cbda8970626b1a578ba7fd46c0061d62e2f94638590a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B2D 5268 bytes
font_01_sfnt_off00006d20.bin
412a1aa8713a63de8636c25a0860147a6139edfe5613ae0944b38c9e538d250b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D20 11148 bytes

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