Malicious PDF — malware analysis report

Static analysis result for SHA-256 26bbd9408b1e0f2b…

MALICIOUS

PDF

43.8 KB Created: 2020-07-21 03:57:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3c5666e93969899041bc4fde34adc26d SHA-1: 1632fdd3ce4845690eac0dfe8b4364669ba8db26 SHA-256: 26bbd9408b1e0f2b5e8382658028d358c0784ca02673d537a491f5dacfdc0165
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits a PDF link farm, with numerous links pointing to external PDFs, likely to obscure the malicious intent and improve search engine ranking. The document body, though heavily obfuscated, contains keywords related to 'Medicare explained pdf', suggesting a lure to trick users into clicking the malicious link.

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/wb?keyword=medicare%20explained%20pdf
    • http://files.poderezollaio.org/uploads/1/3/0/9/130969191/rokuku.pdf
    • http://files.theclasswebsite.org/uploads/1/3/1/4/131453370/bodotivedomexe.pdf
    • http://files.fr.pharmaciecocagne.ca/uploads/1/3/1/4/131453056/4281191.pdf
    • http://files.gabrieleraussewinery.com/uploads/1/3/2/3/132303378/biganepagoxipu-bukosun.pdf
    • http://files.aokcollectibles.com/uploads/1/3/0/7/130776182/zikubaxatubuwujo.pdf
    • http://files.theclasswebsite.org/uploads/1/3/1/4/1
    • https://cdn.shopify.com/s/files/1/0434/6239/4021/files/77455440741.pdf
    • https://cdn.shopify.com/s/files/1/0437/7808/0925/files/gururefixuzaxopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/71651503879.pdf
    • https://vikefejemor.files.wordpress.com/2020/07/36165612233.pdf
    • https://rukoliner.files.wordpress.com/2020/07/50447264041.pdf
    • https://juwurel.files.wordpress.com/2020/06/64568951267.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/32227188755.pdf
    • https://cdn.shopify.com/s/files/1/0438/4191/2997/files/67668361268.pdf
    • https://cdn.shopify.com/s/files/1/0432/2626/7806/files/22422345991.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zemeletitofugawekabol.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/gejazijosenoxijejakoman.pdf
    • https://cdn.shopify.com/s/files/1/0431/5699/6247/files/govetalekag.pdf
    • https://cdn.shopify.com/s/files/1/0428/7938/5756/files/36173530569.pdf
    • https://cdn.shopify.com/s/files/1/0428/7542/0835/files/32073445343.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_off00006f99.bin
96939bdfc1390b5b40252cbb97864199f0d94143daad430cb1acbcd9467ef9fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 4644 bytes
font_01_sfnt_off00007f66.bin
05639810e29f9edbf12756753042715498ae6beda3e83e596e7693f2339a95dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F66 10072 bytes