Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f093c85b75cff4…

MALICIOUS

PDF

46.9 KB Created: 2020-08-21 01:50:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: be47003f91d2ad0d83fba86aac5f9db7 SHA-1: a0a4aa5b5b057efc44220bb857944751dc56b745 SHA-256: f9f093c85b75cff4d44ac4daeafbbe4adbf56ab1f9627d4bdfe93f4b818037e9
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to obtaining a first aid training certificate and includes the malicious URL. This suggests a phishing attempt to redirect users to a malicious site. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.ru/pify?keyword=obtenir+attestation+de+formation+aux+premiers+secours
    • http://files.cobleskillcollegerentals.com/uploads/1/3/1/3/131379567/4719547.pdf
    • http://nogake.lilysparkles.co.uk/uploads/1/3/0/9/130969723/7685650.pdf
    • http://files.balticsportsciencesociety.com/uploads/1/3/1/1/131164442/7559044.pdf
    • http://files.wvolleyballclub.com/uploads/1/3/1/4/131437074/repiwasamu_lisusow_bixugok_koloponobi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/61290659577.pdf
    • https://cdn.shopify.com/s/files/1/0436/0214/9539/files/53163136059.pdf
    • https://cdn.shopify.com/s/files/1/0429/0894/2492/files/minecraft_account_creation_date.pdf
    • https://cdn.shopify.com/s/files/1/0435/8216/1053/files/dishonored_2_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vasopamomakazemujavinis.pdf
    • https://cdn.shopify.com/s/files/1/0439/4732/7646/files/xuvolifarufuvudom.pdf
    • https://cdn.shopify.com/s/files/1/0429/1185/8855/files/94695387400.pdf
    • https://cdn.shopify.com/s/files/1/0440/5523/2677/files/amperemeter_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/kalabhairava_ashtakam_in_english_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0807/files/printable_days_of_the_week_chart.pdf
    • https://cdn.shopify.com/s/files/1/0433/7316/6744/files/79095844769.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_off000073c2.bin
a59b31257fc17dd751042ebb3a030f62bf61da5075fd4ededac28089f6db2d9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73C2 5504 bytes
font_01_sfnt_off00008655.bin
4c3e6b7bbac356f0b22099a25bcc3143b2fd561b1e750f5ccabd956944a5353b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8655 12092 bytes

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