Malicious PDF — malware analysis report

Static analysis result for SHA-256 f93842db06fae1f5…

MALICIOUS

PDF

51.7 KB Created: 2020-08-16 22:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b60863a96d4ffc21e2b9db55be33b7b9 SHA-1: 39022b8f434adac340699ee760b0d3bac80c7c12 SHA-256: f93842db06fae1f59ec09ff590f212f89d9606ddbcea2c2a1c15e3ddcbecab1f
150 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a report title, likely a lure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate malicious destination. The ML classifier strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=informe+auditoria+de+sistemas+de+informacion
    • http://dikanosob.northbeamfinancial.com/uploads/1/3/0/8/130814297/3a95497b29.pdf
    • http://files.thebeamtravel.com/uploads/1/3/1/4/131406140/mexudowaforujav.pdf
    • http://files.latavolamarche.com/uploads/1/3/1/3/131380052/6fe53fc.pdf
    • http://files.conciergepainrelief.com/uploads/1/3/1/6/131606206/kofopije-lofafemax.pdf
    • http://files.guldbrikken.dk/uploads/1/3/1/4/131437225/pesumo_jiwonedo_nezukudomal.pdf
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/85190975282.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/28983667366.pdf
    • https://cdn.shopify.com/s/files/1/0438/3621/1362/files/bandar_malaysia_project.pdf
    • https://cdn.shopify.com/s/files/1/0437/8332/3806/files/61347096009.pdf
    • https://cdn.shopify.com/s/files/1/0429/4138/2812/files/alone_again_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0431/7619/8305/files/c._r._e_form_one_notes.pdf
    • https://cdn.shopify.com/s/files/1/0437/7811/3697/files/66891413359.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/pevapapiluwejemukoxigu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5861/6733/files/pebabagogule.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff6.bin
192e9d533813016a4e0c1bdb71cadcb8b9c4887b6438c1ff1c773a8132389105		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF6 1604 bytes
font_01_sfnt_off0000681a.bin
adb2cbd13ba30ff985c801e0d025c9c0e695babc63e4532f75026021771ca46d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x681A 4956 bytes
font_02_sfnt_off000078ca.bin
590fb2330137dc7989dcf74c0772c2244dad9b628ac1cb6bc0b86ef7d994ad1c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78CA 10712 bytes
font_03_sfnt_off00009bec.bin
c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEC 16204 bytes
font_04_sfnt_off0000b11b.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB11B 4324 bytes

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