Malicious PDF — malware analysis report

Static analysis result for SHA-256 b81d5d3f2289b7e9…

MALICIOUS

PDF

99.8 KB Created: 2020-08-20 04:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72b5d596336e13fa0991bd3ebde6c2e4 SHA-1: 58928979509824de565ff688976765ca35122ea6 SHA-256: b81d5d3f2289b7e9d85d0c60e61955b4bbc1d351a9962eea26e84c95660478f9
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the string "Fed up movie notes answers" and the malicious URL, suggesting a phishing or scam lure. The presence of multiple embedded PDFs hosted on various domains indicates a broad distribution effort. No scripts were extracted from this sample.

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=fed+up+movie+notes+answers
    • http://files.penkhullfestival.com/uploads/1/3/0/8/130874316/nunetadawifal.pdf
    • http://files.casalatinosunidos.org/uploads/1/3/0/7/130776828/1373646.pdf
    • http://files.tsuaadetroit.org/uploads/1/3/0/7/130739835/7092113.pdf
    • http://pufare.wall-in.com/uploads/1/3/2/6/132696067/guwidotajagipigadi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3765/5191/files/hunter_quest_guide_wow_classic.pdf
    • https://cdn.shopify.com/s/files/1/0445/8423/9268/files/acres_of_diamond_book.pdf
    • https://cdn.shopify.com/s/files/1/0436/3531/0752/files/cd4011bcn_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0434/3254/2369/files/39127168452.pdf
    • https://cdn.shopify.com/s/files/1/0434/8051/4726/files/71430622773.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/picard_facepalm_ascii.pdf
    • https://cdn.shopify.com/s/files/1/0433/7028/3166/files/daigremontiana_kalanchoe_aranto.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/38953588723.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/93883019983.pdf
    • https://cdn.shopify.com/s/files/1/0428/0100/4707/files/brushless_dc_motor_principle.pdf
    • https://cdn.shopify.com/s/files/1/0432/6631/0299/files/fundamentals_of_astrodynamics_and_applications_4th.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_off00014b2c.bin
5d87c06ff90e22360d3fa20d7a28f506acceeacad677c2535fe7bd025a489f24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14B2C 5180 bytes
font_01_sfnt_off00015cca.bin
15fb61db286d14eee43d4c3ea54be79a32ccd1766619d1bcdb69685a6550391c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCA 10812 bytes

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