Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a3a8ec962f3eac7…

MALICIOUS

PDF

42.6 KB Created: 2020-08-28 01:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 532af06468f35987bf222af50f342852 SHA-1: a45983bb638903a58ee60dc25f3314cad4dbce5f SHA-256: 2a3a8ec962f3eac7871e9f08fb8619cf8bebdd60d4bb56c3935481a2096ea66b
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=present+simple+and+present+continuou'. This indicates a social engineering lure designed to trick the user into clicking the link. The document also contains a large number of external PDF links, many hosted on Shopify, which is characteristic of SEO link farm abuse. No scripts were extracted, but the presence of the malicious redirector URL is sufficient evidence of malicious intent.

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=present+simple+and+present+continuou
    • http://kokopagex.businesstodaynewsletter.com/uploads/1/3/2/6/132681352/jezuxoneduwemevuj.pdf
    • http://files.georgeswalkies.co.uk/uploads/1/3/1/0/131070911/jalufu_jonamobajeloxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/9444/8030/files/20334157956.pdf
    • https://cdn.shopify.com/s/files/1/0436/3301/6982/files/zupetogifa.pdf
    • https://cdn.shopify.com/s/files/1/0433/0638/5576/files/notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/1103/7589/files/accellion_plugin_for_outlook_2016.pdf
    • https://cdn.shopify.com/s/files/1/0434/2733/2252/files/essentials_of_understanding_abnormal_behavior_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3583/6072/files/dizepujozeragedazegexo.pdf
    • https://cdn.shopify.com/s/files/1/0464/2347/4328/files/liretaval.pdf
    • https://cdn.shopify.com/s/files/1/0444/0326/1606/files/arthur_clarke_the_sentinel.pdf
    • https://cdn.shopify.com/s/files/1/0429/8693/0329/files/biwuwobuvofuwik.pdf
    • https://cdn.shopify.com/s/files/1/0432/7368/3112/files/39335045263.pdf
    • https://cdn.shopify.com/s/files/1/0432/2381/0203/files/37061875332.pdf
    • https://cdn.shopify.com/s/files/1/0432/9383/5432/files/reporting_collinearity_statistics.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_off00005d13.bin
aa61364fa96069e77cacf9b101d136d97e7a524faf5c7b72bd9190800886ec0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D13 5220 bytes
font_01_sfnt_off00006ea8.bin
6390057591f980d6c4b56ef6b076aab7c41caf8ddcdb54862ba8040917b0e38f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA8 14568 bytes

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