Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8801d9cb3f29e9…

MALICIOUS

PDF

44.2 KB Created: 2020-08-25 01:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 707d70ad6aacde9e6e32a88d1a7d77ad SHA-1: fd70dc26a2745858e7c3d4b13615330129190a53 SHA-256: ff8801d9cb3f29e91b52e3486d227e46d7701ed7ee25a66b293a3543d887545e
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, which is also present in the document body. This link, 'https://ttraff.ru/pify?keyword=interpreting+graphs+worksheet+pdf+grade+4', is designed to lead users to malicious infrastructure. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify. The primary malicious URL is the most critical IOC.

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.ru/pify?keyword=interpreting+graphs+worksheet+pdf+grade+4
    • http://files.butlerearlyaccessnetwork.org/uploads/1/3/0/7/130776254/fafor.pdf
    • http://files.arlenespiegel.com/uploads/1/3/2/3/132302978/fexurojasi_sivofoweroxen_suvetijopefi.pdf
    • http://files.stampexinternational.co.uk/uploads/1/3/0/7/130739383/zozewisibu_danenugoravinas_zibazoned_vinudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3519/7602/files/12305204961.pdf
    • https://cdn.shopify.com/s/files/1/0432/5149/9170/files/13764865203.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/zafurimejojeninekolisur.pdf
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/digolotemiwikorul.pdf
    • https://cdn.shopify.com/s/files/1/0437/2722/4986/files/mikel_phelps_smoking_weed.pdf
    • https://cdn.shopify.com/s/files/1/0431/5168/7848/files/forklift_driving_test_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6064/8343/files/jozidunajeredo.pdf
    • https://cdn.shopify.com/s/files/1/0434/7035/6637/files/jupin.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1718/files/789471802.pdf
    • https://cdn.shopify.com/s/files/1/0437/0884/2152/files/27546203389.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/
    • https://cdn.shopify.com/s/files/1/0434/7

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000617b.bin
093ea84706bf688e6f5beecca871f08dca9181d6c517cbe625529a9de4ac2ab3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617B 5240 bytes
font_01_sfnt_off00007351.bin
2b34bcdeb62c2040c8cc42517ef3a9e21cfd296b168ee37e34094e06ccec55df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7351 9948 bytes
font_02_sfnt_off00009560.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9560 4324 bytes

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