Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb3caf7a4c00021e…

MALICIOUS

PDF

59.8 KB Created: 2020-08-10 01:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50f817449c30b56b3157f53feee22ecb SHA-1: 782e12371a9b795aa4fd0bd293e2e0746be20f9b SHA-256: bb3caf7a4c00021e34f7a083cd84de5f27d9a045ba979273a68ed359f0b4ddee
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure for a free download of a technical manual. The presence of a malicious redirector indicates an attempt to lead the user to harmful content, likely for further exploitation or malware delivery.

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/pify?keyword=how+to+use+digital+multimeter+pdf+free+download
    • http://files.rubenmfg.com/uploads/1/3/0/8/130814124/jedexumigo.pdf
    • http://files.clearlightastrology.com/uploads/1/3/1/4/131436956/8830642.pdf
    • http://sajunaf.iflightbook.com/uploads/1/3/0/9/130968917/8244d3e21.pdf
    • http://files.clarkforkpantry.com/uploads/1/3/0/9/130969681/1809655.pdf
    • http://files.clansinclair.ca/uploads/1/3/1/1/131163904/7919311.pdf
    • https://cdn.shopify.com/s/files/1/0430/7753/3856/files/topographical_anatomy_of_man.pdf
    • https://cdn.shopify.com/s/files/1/0437/7667/1895/files/adder_subtractor_circuit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negonarufefozosaburesid.pdf
    • https://cdn.shopify.com/s/files/1/0430/4027/6642/files/xejisefuva.pdf
    • https://cdn.shopify.com/s/files/1/0433/0094/6073/files/51731011183.pdf
    • https://cdn.shopify.com/s/files/1/0429/1965/7635/files/functional_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0438/2756/0610/files/niwitofutifuwosogazusudum.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/counter_strike_source_command.pdf
    • https://cdn.shopify.com/s/files/1/0428/6559/0438/files/80623306632.pdf
    • https://cdn.shopify.com/s/files/1/0430/2562/9335/files/detur.pdf
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/butag.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/vurujavuneju.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008ebd.bin
2e7138d95b6242483d4617d109176deac30eab49094bb3562439a0f63e56b154		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBD 5296 bytes
font_01_sfnt_off0000a079.bin
21b234704848fbecab0a56cb0868772fe580bb687489ad2b6fb3f3f80534b503		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA079 6252 bytes
font_02_sfnt_off0000afa5.bin
d372354f91cdfa1b2bf0b2b828895702bebf0445b44b8cdf1131ab2dafe62b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFA5 10292 bytes
font_03_sfnt_off0000d2eb.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EB 4324 bytes

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