Malicious PDF — malware analysis report

Static analysis result for SHA-256 a376816fa172f5a3…

MALICIOUS

PDF

43.3 KB Created: 2020-08-06 01:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88928f063c1d95826e1f8ec8084f3a88 SHA-1: ec330d62ac8c98b487c7774a040cb1f5757e64b6 SHA-256: a376816fa172f5a31855e9debd0fbfbe3256b4633a84d966741bcf1c6c595dc4
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. This link, 'https://ttraff.cc/pify?keyword=big+bang+theory+science+facts+pdf', is designed to lure users by appearing to offer science facts. The PDF also exhibits characteristics of a link farm, embedding numerous external links, many of which point to Shopify domains. The primary malicious link likely serves as a gateway to further malicious content.

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=big+bang+theory+science+facts+pdf
    • http://files.sparklecleaning.net/uploads/1/3/1/6/131637037/xirij_zulevulaf_kovufu.pdf
    • http://files.cohobrewing.com/uploads/1/3/1/3/131380397/rukefe_mupomubujuma_goxin.pdf
    • http://files.saarticambodia.com/uploads/1/3/0/8/130814644/4c7fa.pdf
    • http://files.clowninstitute.com/uploads/1/3/1/4/131437660/3b84b2bd1e.pdf
    • http://files.electrolysisandco.com/uploads/1/3/1/6/131636745/1357350.pdf
    • https://cdn.shopify.com/s/files/1/0440/8328/2070/files/xisifasowewag.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/73198631355.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/masofibefakovotaxugawaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/89875474994.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6974/files/pedubo.pdf
    • https://cdn.shopify.com/s/files/1/0431/3910/4917/files/fimupojavik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/xepubaxesarusasifazelupe.pdf
    • https://cdn.shopify.com/s/files/1/0434/4909/0200/files/comment_fusionner_deux_documents_en_un_seul_sur_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/1722/3847/files/dutuvunazuwudegukide.pdf
    • https://cdn.shopify.com/s/files/1/0437/6212/2903/files/21307298762.pdf
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/35399541051.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_off0000698a.bin
7a183622e2cacf2d5e8f20d91c38b9a836a66250936fb2bd3572d088022ce29c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x698A 5676 bytes
font_01_sfnt_off00007ce3.bin
19f826195cb122e0742e380a1ef5c015d044100076bfa494a7f3dfaa20c38946		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CE3 10436 bytes

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