Malicious PDF — malware analysis report

Static analysis result for SHA-256 c58dacef096765ae…

MALICIOUS

PDF

45.1 KB Created: 2020-08-29 20:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6a22ddce7ca1445da47c983b3a3a8cd SHA-1: 77a25956aee02999b2771e221823a81fbade44b2 SHA-256: c58dacef096765aee49a6738b49755c61a5a250159b0b19dbaa5c50c602ab5e2
150 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, specifically pointing to 'https://ttraff.cc/wix?keyword=lets+get+it+started+in+here'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, including one to a Shopify domain that appears to be a lure. The document body, though heavily obfuscated, contains the malicious URL and other benign-looking PDF links, suggesting an attempt to disguise malicious intent. The primary attack pattern involves tricking the user into clicking the malicious link, which likely leads to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=lets+get+it+started+in+here
    • https://cdn.shopify.com/s/files/1/0433/9567/8357/files/sample_character_reference_letter_for_court_child_custody.pdf
    • https://cdn.shopify.com/s/files/1/0431/7816/4387/files/hanging_sheetrock_over_plaster_ceiling.pdf
    • https://cdn.shopify.com/s/files/1/0431/4752/6293/files/zibudirilovirel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5322/7936/files/nalototonamoz.pdf
    • https://cdn.shopify.com/s/files/1/0462/0409/2569/files/free_joomla_photography_website_templates.pdf
    • https://cdn.shopify.com/s/files/1/0434/2457/9736/files/importance_of_demographic_information_in_research.pdf
    • https://static.usrfiles.com/ugd/b8c837_5275b60d53e04940a0f0ca0851ebc307.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d64aeb2fd244f58acb219daefbb57bf.pdf
    • https://static.usrfiles.com/ugd/b8c837_7bcc7ed12d6f4e20a27e744070c3c711.pdf
    • https://static.usrfiles.com/ugd/b8c837_f6dc46405b074502859cef609ce0d915.pdf
    • https://cdn.shopify.com/s/files/1/0438/2208/8354/files/33986845019.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/64866490294.pdf
    • https://cdn.shopify.com/s/files/1/0435/7783/5681/files/57719246794.pdf
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/fopebixosar.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_off00006510.bin
1b07343c17a1262d1dc0d3d9cb44ec1ae3dc7af882e0d5e6edc04ff2e0b84683
pdf-font-stream PDF embedded font (sfnt) at offset 0x6510 4996 bytes
font_01_sfnt_off00007600.bin
d63f6ff94f6cacd0f3bf709595e365b087a26b4ec8574a830ef465bde8eccaa4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7600 16312 bytes