Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7938574f73c0a33…

MALICIOUS

PDF

47.4 KB Created: 2020-08-08 12:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9b162923bb8f541932f8c73120451bea SHA-1: 7f05d39371918ce521b9080abbb2641d8d1154d8 SHA-256: d7938574f73c0a332d7ca6bc6cf08e514197595e39ae08cfc1ef21ebde0e755d
150 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, directing users to 'https://ttraff.cc/pify?keyword=toot+toot+beep+beep+book+pdf'. Additionally, it features a mass external PDF link farm, with many links pointing to Shopify domains, likely to improve search engine ranking for malicious content. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector is the deceptive link within the document body.

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=toot+toot+beep+beep+book+pdf
    • http://zudiruseg.excelpodiatryclinic.com/uploads/1/3/1/8/131856919/1214330.pdf
    • http://mixon.goodmamascleansingclay.com/uploads/1/3/1/3/131398020/kogelijonopigin.pdf
    • http://kogepul.neatshomegarden.com/uploads/1/3/1/6/131606490/teleguzalanek.pdf
    • http://vamewage.ovmakeup.com/uploads/1/3/2/7/132712615/zuremixunizakipokek.pdf
    • https://cdn.shopify.com/s/files/1/0441/1247/8360/files/70059254048.pdf
    • https://cdn.shopify.com/s/files/1/0433/9105/8070/files/rowerivazaxidoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/7045/5957/files/bofubipafagekuxe.pdf
    • https://cdn.shopify.com/s/files/1/0436/3947/2288/files/ejercicios_de_anualidades_generales.pdf
    • https://cdn.shopify.com/s/files/1/0433/6304/1430/files/89392668997.pdf
    • https://cdn.shopify.com/s/files/1/0437/1628/0475/files/discord_markdown_languages.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/putinuwinewemawi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4512/5281/files/45727745479.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/scott_accugreen_3000.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/munesepazifozojowoxo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4792/5413/files/concerto_for_2_violins_in_a_minor_rv_522.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_off00007e3b.bin
b9c1f9c2bb0fc64f5d72e263a593a03539254e32e87739ca4bcc7574f602a1a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E3B 4672 bytes
font_01_sfnt_off00008e34.bin
e3c81c54b2f235cc983eb2ee3b2fa101e73430327a07d01256456fb27e3dd6f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E34 10192 bytes

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