Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd3edc807dd7436a…

MALICIOUS

PDF

39.3 KB Created: 2020-08-21 16:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753bd0c090ea3dd42b765a264e69060f SHA-1: 841c7e4639da5effdd1ef751d06046c9eac614c4 SHA-256: cd3edc807dd7436acc8417a826f8a6858f794581eda52539cb7ed281b53f8a05
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, which is the primary indicator of malicious intent. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=american+football+jersey+mockup+psd+free', which is also flagged as a malicious redirector. The file also exhibits characteristics of a link farm, with numerous external PDF links, many pointing to Shopify domains, likely for SEO manipulation to increase visibility. The primary malicious URL is used to redirect users to potentially harmful 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.com/pify?keyword=american+football+jersey+mockup+psd+free
    • http://rexoliso.mezzanineboutique.com/uploads/1/3/0/8/130813612/fomidutinosado.pdf
    • http://files.comeshootwithme.com/uploads/1/3/1/4/131406966/selanukadenurakukaka.pdf
    • http://files.carpiserve.net/uploads/1/3/1/1/131164250/nifepezax_xovinebunew.pdf
    • http://files.thelittleschoolproject.com/uploads/1/3/0/7/130775098/lupadakumepemux.pdf
    • https://cdn.shopify.com/s/files/1/0451/8975/9127/files/regugexudezapulodivofekon.pdf
    • https://cdn.shopify.com/s/files/1/0447/0997/0073/files/motor_vehicle_act_amendment_bill_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/software_to_convert_to_editable_word_document_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/hardware_asset_management_interview_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8688/8612/files/91863261940.pdf
    • https://cdn.shopify.com/s/files/1/0433/7329/7814/files/25275328016.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/75469399445.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/fajenotipiwiduviroxaz.pdf
    • https://cdn.shopify.com/s/files/1/0440/3943/8486/files/mimikibutagoganemizuvisel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4040/6684/files/hypoglycemia_newborn_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0440/2518/4421/files/vozuxozekojunuzekedozowo.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2556/files/31967749431.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_off0000584a.bin
4431d7d271fe8c9f94d76baadff642c847ae6b13f878896ec5b9de43867c63e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x584A 5672 bytes
font_01_sfnt_off00006b78.bin
22e0e6c5514e9ff36f4843f47a0d6c4554b4006d75d46b687f5f6b50afe6df8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B78 10756 bytes