Malicious PDF — malware analysis report

Static analysis result for SHA-256 8af3926312ddebe5…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 01:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84151967ee957999148734e303aafd91 SHA-1: 76cfc4dd3a38c55976d3fd751f2d1d5e7ad2bfb8 SHA-256: 8af3926312ddebe50a83863b08c981b031bf8b2befbc28692b9eae180d1f6429
200 Risk Score

Malware Insights

MITRE ATT&CK
T1204.001 Malicious Link T1059.003 Windows Command Shell T1218 Signed Binary Proxy Execution

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits heuristics for a link farm and lures the user to execute commands via copy-pasting into a shell, involving LOLBins. The document body, though heavily obfuscated, contains the malicious URL. The primary attack vector appears to be directing users to malicious sites through deceptive links.

Heuristics 5

  • 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
  • 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.ru/pify?keyword=ncert+english+book+for+class+9+solutions+beehive+pdf+download
    • http://kupek.ilovedermalicious.com/uploads/1/3/2/6/132681556/damegirenanifuvaga.pdf
    • http://files.mtdorabuzz.com/uploads/1/3/1/4/131407549/1288320.pdf
    • http://files.aspectratioprojects.com/uploads/1/3/0/7/130739251/fuzuxosofodo.pdf
    • http://files.doghairburning.com/uploads/1/3/1/4/131411688/db3dd.pdf
    • http://files.lostacresresort.com/uploads/1/3/1/4/131452878/nobukozubazuk.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/fedurol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5655/4394/files/powershell_throw_exception.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/81961510188.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/tepegipemalukejufenoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/york_diamond_90_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1079/files/brillouin_zone.pdf
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/rujinenesefid.pdf
    • https://cdn.shopify.com/s/files/1/0433/9171/3447/files/kogavasobuta.pdf
    • https://cdn.shopify.com/s/files/1/0432/1466/7934/files/kalod.pdf
    • https://cdn.shopify.com/s/files/1/0438/3775/1453/files/window_shopper_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0433/7863/9013/files/cntico_de_las_criaturas.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/
    • https://cdn.shopify.com/s/files/1/0431/1020/3545/files/tepegipema

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066c0.bin
5e0e48f33a6d655b7c4bb1ee8d3caa8df8643be52eff7d5d4099328f76a5b947		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66C0 5780 bytes
font_01_sfnt_off00007a66.bin
3b4823db8c183435497598e5ce9b308eb49619901c30e015bae5bd4e0bdde338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A66 9692 bytes
font_02_sfnt_off00009ba8.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BA8 4324 bytes

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