Malicious PDF — malware analysis report

Static analysis result for SHA-256 068cda77b3cd1c09…

MALICIOUS

PDF

45.4 KB Created: 2020-08-28 21:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e53530393c414cfafee75f18bc34cab SHA-1: 3e445ea0d1f5c6c4f7f276bacc802d6d25e3136c SHA-256: 068cda77b3cd1c09e30b8c860f1e18a47e5e7b811775ae381f7c47b8d1680019
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to a malicious redirector, which is a common tactic for phishing or malware distribution. The presence of a large number of SEO-optimized PDF links suggests an attempt to obscure the malicious destination and potentially leverage search engine traffic. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

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.cc/wix?keyword=southeastern+emergency+physicians+llc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0465/9501/4821/files/gakovidajabowaxagomivuri.pdf
    • https://cdn.shopify.com/s/files/1/0438/2546/3456/files/fejituzanujizetakobitike.pdf
    • https://cdn.shopify.com/s/files/1/0431/7977/0019/files/89518386057.pdf
    • https://cdn.shopify.com/s/files/1/0436/2846/2240/files/17945652242.pdf
    • https://cdn.shopify.com/s/files/1/0437/8211/1381/files/46754981003.pdf
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/teori_manusia_sebagai_makhluk_sosial.pdf
    • https://cdn.shopify.com/s/files/1/0429/0710/7495/files/d_d_3._5_complete_arcane_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1492/1114/files/sample_application_letter_for_internship_in_hospital.pdf
    • https://cdn.shopify.com/s/files/1/0429/6104/3605/files/kidedezobazapatoxovoju.pdf
    • https://cdn.shopify.com/s/files/1/0434/2064/7576/files/72846306538.pdf
    • https://static.usrfiles.com/ugd/b8c837_e74b192ddd1b4f3e8f1d9e7986e3cbf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_441bc173269a423b8cc0cf9aab728601.pdf
    • https://static.usrfiles.com/ugd/b8c837_6ca9ee3b85aa4b28a40204dbd0cb6a60.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000632f.bin
45a96ee39603f2e2f69fff8592306fdfefa84f6089cae78420583eb3326daf44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x632F 5432 bytes
font_01_sfnt_off00007579.bin
f22c2921a062cb2956f59cc5569555a6fbe3b0ea465e4a4e2b6f282c538f2d72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 10848 bytes
font_02_sfnt_off00009a3b.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A3B 4324 bytes

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