Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab9ebd2b29eecd18…

MALICIOUS

PDF

35.0 KB Created: 2020-08-31 04:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5929203ba1111ed1ae327a795d9ee211 SHA-1: 5286f6a7f69af267bf29e6b71aa2a5add936e4f1 SHA-256: ab9ebd2b29eecd18e825e549c47a3d01700f2e71461c7fc0906c2c8fa7459858
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service (ttraff.cc). The document body, though heavily obfuscated, contains references to the malicious URL and benign-looking PDF filenames, suggesting a lure to trick users into clicking the malicious link. The primary malicious URL is https://ttraff.cc/wix?keyword=python+syllabus+r16, which is likely used to redirect users to further malicious content.

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/wix?keyword=python+syllabus+r16
    • https://cdn.shopify.com/s/files/1/0439/4654/1211/files/hernando_alvarado_tezozomoc_cronica_mexicana.pdf
    • https://cdn.shopify.com/s/files/1/0437/5835/4593/files/xurowowiginetipaxirezega.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/vuwofexiwalorov.pdf
    • https://cdn.shopify.com/s/files/1/0434/0691/7799/files/nuwave_oven_pro_manual_complete_cookbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/4411/8423/files/62573315555.pdf
    • https://cdn.shopify.com/s/files/1/0428/5012/3932/files/acute_decompensated_heart_failure_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0439/1826/2427/files/vikigexevulabu.pdf
    • https://cdn.shopify.com/s/files/1/0436/3547/4590/files/jatikigu.pdf
    • https://static.usrfiles.com/ugd/b98abb_2b922ec22f93435aa8ca57526af6830f.pdf
    • https://static.usrfiles.com/ugd/b80405_7f7fd249ff4c4f35ac340f9d5d4217b8.pdf
    • https://static.usrfiles.com/ugd/529dbf_f7875e99c0d04b2495dc2de384e336ef.pdf
    • https://cdn.shopify.com/s/files/1/0434/2952/7709/files/minecraft_pe_0._13._0_wiki.pdf
    • https://cdn.shopify.com/s/files/1/0431/4087/4408/files/wutozepi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6571/9449/files/zotesimuzalepibavokopib.pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/vuzegatawo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1410/2950/files/jutoximoxewokopada.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_off00004d1a.bin
557c20191a4d94b00102fc81c41668dece305f9e328ef181db1068ac11dfadab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D1A 5220 bytes
font_01_sfnt_off00005ed7.bin
989eff90eec805bfe1e93c952c993510565e78d720c5d2895f75e291bf906e7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED7 9624 bytes

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