Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb743cba82d8f449…

MALICIOUS

PDF

40.4 KB Created: 2020-08-10 07:27:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07023c9b3067fc0af81e17046456ebfe SHA-1: 5c11f2f6e5e62b48ada5bb37555c02977a58d4cb SHA-256: bb743cba82d8f4491129486711ef8a86dc2d98d761c9e840732cb8f52aa42a65
160 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link to 'https://ttraff.com/pify?keyword=calendar+2020+march+pdf'. The document body, though heavily obfuscated, contains embedded URLs and appears to be a lure for a calendar PDF. The presence of a visible LOLBin command execution instruction suggests potential for further malicious activity, such as downloading and executing a second-stage payload.

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.com/pify?keyword=calendar+2020+march+pdf
    • http://bubiwifo.madcitybadgers.org/uploads/1/3/1/4/131453284/4636103.pdf
    • http://files.littlepoppitsphotography.co.nz/uploads/1/3/0/9/130969633/nuruvibafi_nalegowix.pdf
    • http://files.lcooperillustration.com/uploads/1/3/1/4/131453402/lozupopu-bedota.pdf
    • http://bomuk.harleydavidsongirls.org/uploads/1/3/0/7/130738779/375171.pdf
    • https://cdn.shopify.com/s/files/1/0433/4832/8603/files/25265779219.pdf
    • https://cdn.shopify.com/s/files/1/0431/9395/8560/files/ardene_job_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/delovozojudujosa.pdf
    • https://cdn.shopify.com/s/files/1/0429/8860/1503/files/poditaw.pdf
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/calendrier_2020_avec_numro_de_semaine__imprimer.pdf
    • https://cdn.shopify.com/s/files/1/0433/1054/7099/files/rodoxebetenajufemadotil.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/81143567733.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/bootable_pendrive_cmd_commands.pdf
    • https://cdn.shopify.com/s/files/1/0431/6574/5314/files/88_chevy_truck.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaled.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/eliciting_requirements_in_software_engineering.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_off00005f3c.bin
f46fd14a0ac6b725df9bb136cf3dcc0a8c79a181706eb0f78890d8fa19363d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3C 5396 bytes
font_01_sfnt_off00007163.bin
d0821e1d153ede0658dc3c2b107d45b483179ebb49befac2d0c7ff180247b325
pdf-font-stream PDF embedded font (sfnt) at offset 0x7163 10756 bytes