Malicious PDF — malware analysis report

Static analysis result for SHA-256 95cda5b33bffa03c…

MALICIOUS

PDF

45.1 KB Created: 2020-08-22 04:46:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fb650e5385d981fac303d7666f6b424 SHA-1: e20bcd60c96ae6691ace984fd8b97619b665b1be SHA-256: 95cda5b33bffa03c20a4bdc4419e2ece17fd370bd7bdf745cbe26025dac6a72e
160 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to a redirector service (ttraff.cc). This suggests an attempt to leverage SEO poisoning or phishing tactics by directing users to malicious content. The presence of a visible LOLBin command execution instruction indicates potential for further malicious activity, such as downloading and executing a second-stage payload. The document body itself is heavily obfuscated but contains references to the redirector URL.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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/pify?keyword=aefi+guidelines+2019
    • http://files.prehistoriccollector.com/uploads/1/3/0/9/130969139/pavapew.pdf
    • http://files.pitchperfectok.com/uploads/1/3/1/3/131383314/634068.pdf
    • https://cdn.shopify.com/s/files/1/0432/7692/7142/files/gafisodaf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1417/files/robotic_arm_design_project.pdf
    • https://cdn.shopify.com/s/files/1/0429/2660/4447/files/malopixikixikekewufovafon.pdf
    • https://cdn.shopify.com/s/files/1/0435/5624/1557/files/87299736511.pdf
    • https://cdn.shopify.com/s/files/1/0455/4385/0149/files/textbook_of_oncology.pdf
    • https://cdn.shopify.com/s/files/1/0433/1261/1481/files/cmd_commands_for_windows_7_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0444/5909/8279/files/boardroom_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/3947/3314/files/55330846939.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/29306766075.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/77386609029.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/accounting_concepts_with_examples.pdf
    • https://cdn.shopify.com/s/files/1/0432/7482/9987/files/79136151172.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7870/files/personal_financial_planning_report_sample.pdf
    • https://www.who.int/vaccine_sa
    • 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_off00006785.bin
f22c409940661f0be6dbe4551f21968f6622dbeea312c7bd575cf989e0308a64
pdf-font-stream PDF embedded font (sfnt) at offset 0x6785 5240 bytes
font_01_sfnt_off00007977.bin
bf1693b2d403be928928907741715c922b2e8b15a9f5795abca60421c6355bfc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7977 15220 bytes