Malicious PDF — malware analysis report

Static analysis result for SHA-256 8202cec3ebacec9c…

MALICIOUS

PDF

34.5 KB Created: 2020-08-30 01:22:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b68e78a8cfb77343887ebef8207a902b SHA-1: 3e8e129b0acc382766ecb25d1334c0d88fd5827a SHA-256: 8202cec3ebacec9c522a68296be9f4a8a0c1f557ae22b290256440b1bcbd0ecf
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.com, which is disguised as a link to an ebook. This indicates a phishing or scam attempt. The PDF also contains a large number of external links, characteristic of a link farm, likely for SEO manipulation to increase visibility of the malicious link. No scripts were extracted, but the primary malicious activity is the redirection to a harmful URL.

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.com/wix?keyword=children%2527s+mathematics+cognitively+guided+instruction+2nd+edition+ebook
    • https://static.usrfiles.com/ugd/b8c837_c17d130facb3441690e2030855741e61.pdf
    • https://static.usrfiles.com/ugd/b8c837_a2c4bba5127a4c2b93fd32c817457492.pdf
    • https://static.usrfiles.com/ugd/4f270c_ec9c2d53777042bf9925ba4b5f627057.pdf
    • https://cdn.shopify.com/s/files/1/0430/5253/1869/files/kiss_the_rain_sheet_music_piano.pdf
    • https://static.usrfiles.com/ugd/b50c55_1f9a0aa9403642d8a7a0fac4b264d9f2.pdf
    • https://static.usrfiles.com/ugd/9cc572_5b32a66e72d849b1983198e2d0f2b6e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_84a0b93aa568496e8e1fa3454ffecf22.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/master_degree_study_plan_sample.pdf
    • https://cdn.shopify.com/s/files/1/0460/3425/6036/files/pufozam.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_off000046a8.bin
0c84369f8ecd0d0d2949de98a3e429c91cb091f67c10aaf104173a4b965b68a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x46A8 5792 bytes
font_01_sfnt_off00005a3b.bin
80805699c8d56447087f2489174e0a0415063bc29282e746e4ff4f175332e178		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A3B 10140 bytes

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