Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b61be6c33e9709…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 08:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15d0c0acd9603081ffb6233c96ca7b71 SHA-1: a0425217b9f2c77d2ef748efad2c08e134899895 SHA-256: 85b61be6c33e97092fd57aeb43c7c4e0e438e600a0b13b3f136bf005b824e557
220 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 primary malicious redirector URL pointing to 'https://ttraff.com/pify?keyword=dns+server+unavailable'. Heuristics indicate social engineering lures designed to trick the user into enabling content or executing commands, consistent with ClickFix attacks. The document body itself is heavily obfuscated and contains the malicious URL, further supporting the malicious intent.

Heuristics 6

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • 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=dns+server+unavailable
    • http://files.thorneaircon.com/uploads/1/3/0/7/130776336/7586637.pdf
    • http://files.mx.cbisociety.org/uploads/1/3/1/3/131383673/nudogajilanigulu.pdf
    • http://files.keckmanagementroofing.com/uploads/1/3/1/3/131380612/xofulikokogeg_dutiribosavimep_ripes_mobilomipuxodo.pdf
    • http://files.shadowoodgolfshop.com/uploads/1/3/1/4/131452836/kekefudorazove-redusuvaf-vasesilefur-pujaxufuvusipim.pdf
    • http://files.childrensbenefitconcert.org/uploads/1/3/2/7/132740580/57d4023.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/revexeged.pdf
    • https://cdn.shopify.com/s/files/1/0433/3964/5093/files/56675003189.pdf
    • https://cdn.shopify.com/s/files/1/0431/7544/4631/files/97797316430.pdf
    • https://cdn.shopify.com/s/files/1/0427/6705/7063/files/mujelivonuvumavevot.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0821/files/vinewunuji.pdf
    • https://cdn.shopify.com/s/files/1/0431/7328/1948/files/mafujitinugemakuxa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1916/5086/files/9500912351.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/silver_strand_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/3435/2548/files/zikowirasaxugulukitas.pdf
    • https://cdn.shopify.com/s/files/1/0429/9830/0823/files/25498063105.pdf
    • https://cdn.shopify.com/s/files/1/0429/7608/4117/files/53536361745.pdf
    • https://cdn.shopify.com/s/files/1/0435/6361/4369/files/kigobosinopimepalufa.pdf
    • https://cdn.shopify.com/s/files/1/0439/4260/9051/files/sopuve.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_off00006519.bin
039b62c9ea75ea4d8c5604b7c0b5cbe34f5ad2a4c8e280a72fbf636838e88769		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6519 4880 bytes
font_01_sfnt_off000075c3.bin
e4cc5ab2cc34c8f21f514f6ba5c095819fc9fba3fa60f60312a8ecd766cee8b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75C3 14472 bytes

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