Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacc00a1b7fc3773…

MALICIOUS

PDF

73.0 KB Created: 2020-08-22 10:05:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 660b60c2fd6f2d69f608350d1fce8d32 SHA-1: 4d47471409639b66a85df9000c4b85b25612c2e3 SHA-256: cacc00a1b7fc37733a81dfb46535655c8171b979344ad75af120721c1b3749ec
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, pointing to 'https://ttraff.cc/pify?keyword=microsoft+blend+for+visual+studio'. This URL 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 external links, many hosted on Shopify, which is indicative of a link farm or a method to obscure the final malicious destination. No scripts were extracted, but the presence of the malicious redirector is sufficient evidence of a phishing or redirection attack.

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=microsoft+blend+for+visual+studio
    • http://rufet.jbmaxpublishing.com/uploads/1/3/2/6/132695829/3277028.pdf
    • http://subud.qslibrary.com/uploads/1/3/0/9/130969633/pakejuli-nunununuk.pdf
    • https://cdn.shopify.com/s/files/1/0432/5516/9182/files/biozone_senior_biology_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0439/4646/files/linux_admin_interview_questions.pdf
    • https://cdn.shopify.com/s/files/1/0433/7529/6677/files/72039636450.pdf
    • https://cdn.shopify.com/s/files/1/0431/2920/8992/files/ganevunubikivufobolug.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/xetowaxilovigikafu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2781/files/penyebab_aterosklerosis.pdf
    • https://cdn.shopify.com/s/files/1/0439/8222/5566/files/bawomumilabanetowigozi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6958/8124/files/lofanewotejufapufeded.pdf
    • https://cdn.shopify.com/s/files/1/0432/9321/2827/files/dejopumuti.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/721824015.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_off0000d7ca.bin
b4c5aadc24c92f85f7ba3f9e88da2bb0d788b768b9edba1c7a52fbb8e754da58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CA 5220 bytes
font_01_sfnt_off0000e9a2.bin
f8bf9896b46d0508e7bad909ae46102d7ae5fdcea6df7f3e26672c112309d345		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A2 14244 bytes

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