Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f63368077b9fe94…

MALICIOUS

PDF

48.0 KB Created: 2020-08-31 12:59:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53da1c0f7f25ae6d151bf996891d7bad SHA-1: 5ab5caa875111b95f209f53c28dd21247d9dd0b8 SHA-256: 5f63368077b9fe9401ae0c1228b78aa6a4bbac68595ec023d82e93e7ef162260
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to manipulate search engine results or distribute further malicious content. The presence of a malicious redirector URL points towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=dgs+t%25C3%25BCrk%25C3%25A7e+konu+anlat%25C4%25B1m%25C4%25B1
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_3cc6f02fb8b14d88ac3c5a7bb30b2a08.pdf
    • https://static.usrfiles.com/ugd/6f9b04_faa201b78b1640c28dfd1b7844fca6ae.pdf
    • https://static.usrfiles.com/ugd/79e5df_e6dd60b3fe7946f8a4ebbe2bcea36ca2.pdf
    • https://static.usrfiles.com/ugd/86319b_f97023f3628f4ccb9f2ae7063ea681d5.pdf
    • https://static.usrfiles.com/ugd/b8c837_7f19fccfaa3946ce9e5e591fb39577f8.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ec8654f047b474196717cf639bc79e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e38f667fcf874eafb195180f138fee3d.pdf
    • https://static.usrfiles.com/ugd/7f16bd_bb20389e8da34f179edbe317329a31bc.pdf
    • https://static.usrfiles.com/ugd/565485_aa2e0ffdacb346868b0c660b688ce4bc.pdf
    • https://static.usrfiles.com/ugd/b8c837_d5a5047d9d8a4ecbba75e7760441ed38.pdf
    • https://cdn.shopify.com/s/files/1/0434/0508/2780/files/61731249765.pdf
    • https://cdn.shopify.com/s/files/1/0429/6127/2995/files/rumejojipugijodijaketaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8942/8637/files/kerala_beverages_price_list.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d0a.bin
17520523e1af14f3978758439b9819907902c8cdaa2b50feb236e82c88711e66
pdf-font-stream PDF embedded font (sfnt) at offset 0x6D0A 5404 bytes
font_01_sfnt_off00007f33.bin
9c08a7deaba9714bd83e80429c41eda758baca32af5f29c7a8d80fe4cd41978a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F33 17056 bytes