Malicious PDF — malware analysis report

Static analysis result for SHA-256 0010f1fb9aaff056…

MALICIOUS

PDF

49.1 KB Created: 2020-08-30 16:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9982041c4ffab9848949da06ff7695ab SHA-1: ee4ee923bbee41647149ec1a2ce577a7fcf1adc1 SHA-256: 0010f1fb9aaff056a1c9a3200ccd2a8caf5c4934afdb09e1ffde7b9889f596ef
210 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.003 Windows Command Shell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.cc/wix?keyword=windows+10+usb+stick+format'. Additionally, it exhibits a heuristic for a clipboard command lure, suggesting the user is instructed to copy and paste commands into a shell. The ML classifier also strongly flagged this PDF as malicious. These findings indicate a likely phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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/wix?keyword=windows+10+usb+stick+format
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/b8c837_82d1aec97a9741bb9f23b1b8250a3e55.pdf
    • https://static.usrfiles.com/ugd/ea78e0_0603cc5c3da34ade8a15072fef54a610.pdf
    • https://static.usrfiles.com/ugd/87a178_715b9bc02a294fbe945d5f37ebb40941.pdf
    • https://static.usrfiles.com/ugd/384ea4_b34ed848db6f480db82036eb6c2d96c3.pdf
    • https://static.usrfiles.com/ugd/c12414_1ccddc160b9f42eeb4a6c3eec261cbc9.pdf
    • https://static.usrfiles.com/ugd/b8c837_e37f0d60dca64d2186135b4c078352fe.pdf
    • https://cdn.shopify.com/s/files/1/0435/1793/5770/files/faritibavasixale.pdf
    • https://cdn.shopify.com/s/files/1/0449/2269/9943/files/slow_cooker_recipes_uk.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c4bcfd4219a421899f64d8d8e73d6f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_33b5473b48854912a814f3597e7a1539.pdf
    • https://static.usrfiles.com/ugd/0d002d_77ce384f981042f09df32f064420e3e3.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073b4.bin
3dc1dc3652aede25d473c17e732086bff4fe4b5a49f57a63ff6507bf30fbe242		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B4 5404 bytes
font_01_sfnt_off00008609.bin
1729e40ebc00b35a30bbf01871e292252d1b36b076005992b8e86dc3db3c6220		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8609 10388 bytes
font_02_sfnt_off0000a95d.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA95D 4324 bytes

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