Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc1cdf8b01010f96…

MALICIOUS

PDF

40.4 KB Created: 2020-07-28 09:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6ad977128de8e289a43336db28068d1 SHA-1: 59f4c2086bb31fd6a5876f9343d6835f19a926e7 SHA-256: cc1cdf8b01010f961a2999ccd44dec365737180c85a52dcb657e60c5a42320b0
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body, though heavily obfuscated, appears to be a lure related to educational materials, likely to trick users into clicking the malicious links. The ML classifier strongly supports the malicious verdict.

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=math+kangaroo+usa+2015+questions+and+answers
    • http://files.urqigong.com/uploads/1/3/2/6/132695365/kowukodanu-xudezulipe.pdf
    • http://files.carsonsportsprints.com/uploads/1/3/0/8/130874029/09a1c314f7.pdf
    • http://files.mustangs4mustangs.org/uploads/1/3/1/3/131398184/2144504.pdf
    • http://files.youthforum.in/uploads/1/3/0/7/130775465/9156266.pdf
    • http://files.youthforum.i
    • https://cdn.shopify.com/s/files/1/0433/5144/1563/files/27934749099.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0528/files/vexuzitosokiwuxiwigatij.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/wagaxafuxopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/8924/8924/files/bofekumizipa.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/ruwukozovadipirabodejute.pdf
    • https://cdn.shopify.com/s/files/1/0434/4990/9415/files/tekebapolopijub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4845/9673/files/32803513860.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/kusovuxenodo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5762/6792/files/85883464378.pdf
    • https://cdn.shopify.com/s/files/1/0431/5509/5716/files/wuvasaxabanewibege.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78682713185.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3439/files/pafimuzejivizudova.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_off00005c8c.bin
16d32c3e8ebc5e517d19f321f5e435248fbf47e9d09fec050620ced630f13aa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C8C 5676 bytes
font_01_sfnt_off00006fe5.bin
7fd530d2aab3756fea7a37e8b7efc17c27592734e8641bb35738e7dec131c9c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE5 10740 bytes

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