Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2b3f6f5bb651df1…

MALICIOUS

PDF

83.5 KB Created: 2020-08-08 19:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52030d1320eebe12f687614087f02a71 SHA-1: 41948e3ef01fce1461d16ff85fd8fe7796a5f3f9 SHA-256: a2b3f6f5bb651df149cd9ba14f7f45d5be2fb6d74783e28559b3002390376a12
160 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a social engineering attempt. The document body, though heavily obfuscated, contains a URL that matches the redirector link found in the heuristics. The heuristic 'SE_BROWSER_INSTALL_LURE' further suggests the document's intent is to trick the user into performing an action, such as clicking a link or installing something, to view content. The primary malicious IOC is the ttraff.com redirector.

Heuristics 4

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=literacy+learning+progressions+pdf
    • http://files.frankmarcopolos.com/uploads/1/3/0/8/130813612/laninomi_wuzogudaras.pdf
    • http://files.lightonplaza.com/uploads/1/3/0/7/130775747/5855531.pdf
    • http://files.strikezoneacademy.net/uploads/1/3/1/8/131871501/safetobesunujaduf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ximulomonarosaw.pdf
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/fipuvedevukegitumimikopu.pdf
    • https://cdn.shopify.com/s/files/1/0428/0378/9991/files/ronofubataveri.pdf
    • https://cdn.shopify.com/s/files/1/0437/4305/1937/files/fuxitere.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/gosebuberinudexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/thick_leather_farming.pdf
    • https://cdn.shopify.com/s/files/1/0431/7226/6138/files/puzojagoluriratuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/6130/4728/files/zizane.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4897/files/vonokikinidelat.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8865/files/rezevo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3750/files/aliphatic_and_aromatic_hydrocarbons_ncert.pdf
    • https://cdn.shopify.com/s/files/1/0429/0327/3628/files/badafamoguburizegomil.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcd8.bin
d363fc09aa72d04ee40305a3efbcf9846a7c10f8609330612c50981e99f910e7
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD8 5156 bytes
font_01_sfnt_off00010e6f.bin
19a74815a1f5da1ed630a00f9c9a707d325bd1266de103b625a43c9745aa0e3f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E6F 10780 bytes
font_02_sfnt_off000132d7.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x132D7 4324 bytes