Malicious PDF — malware analysis report

Static analysis result for SHA-256 845ced49256328c1…

MALICIOUS

PDF

45.4 KB Created: 2020-08-01 13:18:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82e114a4bdcb40e2b1d95f0e3fb1d2bb SHA-1: cf7f4e112e534addcd6172bc8edf86fe0e22ddac SHA-256: 845ced49256328c18ca59d2a7f62ff1bbf2a8e1b38d23b69134b2a20591c10c8
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, directing users to 'https://ttraff.cc/pify?keyword=php+loop+through+array'. It also exhibits characteristics of a PDF link farm, with numerous embedded links, many pointing to Shopify domains. The document body, though heavily obfuscated, contains the same redirector URL and a reference to 'wkhtmltopdf', suggesting it was generated by a tool for creating PDF documents, likely for malicious purposes.

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=php+loop+through+array
    • http://files.matthewjgoodwin.org/uploads/1/3/2/7/132740804/56b46da9.pdf
    • http://files.falconhillbz.com/uploads/1/3/2/6/132682882/zetobisudofijon.pdf
    • http://files.bluelabelproducts.net/uploads/1/3/2/6/132680808/mufise-lewipepodorudot.pdf
    • http://files.easygocentralillinois.com/uploads/1/3/1/4/131437932/xugebokuzi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5452/1758/files/widuzeja.pdf
    • https://cdn.shopify.com/s/files/1/0433/6461/4303/files/vebudokenu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/82587466082.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87678197609.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/sevanatozasivopitat.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/zikozozusofis.pdf
    • https://cdn.shopify.com/s/files/1/0428/9780/1375/files/53935490779.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9341/files/palewapurodazoxuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/lakadafidepamupiwek.pdf
    • https://cdn.shopify.com/s/files/1/0436/0939/1261/files/gotasorel.pdf
    • https://cdn.shopify.com/s/files/1/0434/8110/4541/files/gisejanele.pdf
    • https://cdn.shopify.com/s/files/1/0434/3837/5074/files/66096392835.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_off000065c2.bin
8d2ea79490fac371089135e8f1cc555767bd825bd221e9ab5ae147649f6aa948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65C2 5004 bytes
font_01_sfnt_off000076cc.bin
e372a19aa309243d9af10dc67ee31aa6c3b92020c42a5c4377d91d8d72698fe7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76CC 15780 bytes

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