Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ea3729d740dbdb…

MALICIOUS

PDF

77.4 KB Created: 2020-08-16 21:14:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f19317bafc85a4b29eab52de0bf9e9e SHA-1: bb7f613a912691f6e80c1e829f4147f672dd964a SHA-256: c2ea3729d740dbdb846c963b32a73b70281af2b8fa37ced8c29655ba00c53c37
120 Risk Score

Malware Insights

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

The PDF contains a link that is identified as a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for "Airborne express case study answers". The primary malicious IOC is the redirector URL, which likely leads to a further stage of the attack.

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=airborne+express+case+study+answers
    • http://files.hamstersinmyhead.com/uploads/1/3/0/7/130776776/dorevutopowat.pdf
    • http://files.patriciagodden.com/uploads/1/3/1/4/131483019/5adf2.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/9404259159.pdf
    • https://cdn.shopify.com/s/files/1/0429/6749/8911/files/83473480168.pdf
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/zoxegofifisoborataz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1608/5923/files/59713805353.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/nuxitidojej.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/paluverubafasimitanaxesej.pdf
    • https://cdn.shopify.com/s/files/1/0431/9451/5614/files/nuwafitogudataxevajokasow.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/80906238464.pdf
    • https://cdn.shopify.com/s/files/1/0439/4293/6731/files/81671624201.pdf
    • https://cdn.shopify.com/s/files/1/0437/0389/4171/files/4913947544.pdf
    • https://cdn.shopify.com/s/files/1/0430/7727/1713/files/65361797527.pdf
    • https://cdn.shopify.com/s/files/1/0437/6395/7914/files/3ds_max_tutorials_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/8693/7253/files/download_windows_7_disc_images_iso_files.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_off0000f224.bin
ed56c0b7f101dc6309d05ff45372107e198888f0d412bd95529122612dd3f683		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 5428 bytes
font_01_sfnt_off000104a6.bin
400ff5bd846136f65d734290aed3096af07bb672f7c08aacb53159c677243d61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104A6 10452 bytes

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