Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c81a2db25e518fc…

MALICIOUS

PDF

44.8 KB Created: 2020-09-08 03:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0248c413b5f1da37af0dad8664e9db09 SHA-1: 35fb3200592801eb90c6d823251d26d17b654c13 SHA-256: 2c81a2db25e518fcef107ee61edca2dc81540ac0eedb9a3345a29dfd562ebdae
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'contact form template free' and the malicious URL. This suggests a phishing or social engineering attack aiming to redirect users to malicious infrastructure.

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.ru/wix?keyword=contact+form+template+free
    • https://static.usrfiles.com/ugd/b8c837_71ee7a45dfad423e9b5932f2d52fef28.pdf
    • https://static.usrfiles.com/ugd/2a2e94_7170427120f9416ba130455615a5e1ed.pdf
    • https://static.usrfiles.com/ugd/38955b_4f789006ee7d4c43a70907cdf0ff8192.pdf
    • https://static.usrfiles.com/ugd/ab922d_086c6369f653483790be6cafad1b06f2.pdf
    • https://static.usrfiles.com/ugd/b58d21_95420aa03b0c4c84967367e19391b2e7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0737/6542/files/ccna_cyber_ops_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/8828/9694/files/nekoruzuvisidito.pdf
    • https://cdn.shopify.com/s/files/1/0436/7410/8057/files/bobewaki.pdf
    • https://cdn.shopify.com/s/files/1/0430/6694/9799/files/como_agua_para_chocolate_english.pdf
    • https://cdn.shopify.com/s/files/1/0428/1863/3894/files/islamic_bayan_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0461/9993/1038/files/ctet_question_paper_2019_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0433/7198/7098/files/29269719679.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_off00007457.bin
bd7655700cf8d7ea39bbd1aee6af2086bf3eec77c9beb9939c9a7361d6fce5bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7457 4888 bytes
font_01_sfnt_off000084e0.bin
960f2a3ea83a70fc185cdbc02ff7766a4514c2649b8f75a646bca6f74ba22fcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84E0 9952 bytes

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