Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b80a64d2a4a3e2a…

MALICIOUS

PDF

34.5 KB Created: 2020-09-09 23:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54d62049fd4898e5f7624d42267ef99e SHA-1: a639a5c966856c2610b5afd60ed2828828fb46d5 SHA-256: 6b80a64d2a4a3e2a573c4396d56ad3fcb44a67d81caf0352a5124d263deb138c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which is identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'topographical survey report' lure, which aligns with the malicious redirector's URL. The presence of numerous external PDF links further indicates a link farm or redirection strategy, likely to deliver a secondary payload or phish for credentials.

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.link/wix?keyword=topographical+survey+report+doc
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/0adedf_c0bca568fff04ae89b3f7e1638b3ff74.pdf
    • https://static.usrfiles.com/ugd/6924eb_12681c0a6ae140e08b24c9d4f1ba12fa.pdf
    • https://static.usrfiles.com/ugd/b8c837_a47a680e4ec94322a405f54667ff81ba.pdf
    • https://static.usrfiles.com/ugd/f0e51d_6826f1a8e8d14db69ba8dad0c39b45de.pdf
    • https://static.usrfiles.com/ugd/b30cf0_fbaca147ee9447159a1119d9f7e04e5a.pdf
    • https://cdn.shopify.com/s/files/1/0458/1258/0518/files/fax_cover_letter_format_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7445/files/making_compound_words_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/8163/7794/files/95094736795.pdf
    • https://cdn.shopify.com/s/files/1/0437/0671/2219/files/81938089622.pdf
    • https://cdn.shopify.com/s/files/1/0431/1311/9905/files/89735809335.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/22728238923.pdf
    • https://cdn.shopify.com/s/files/1/0431/6394/3074/files/gifowozux.pdf
    • https://cdn.shopify.com/s/files/1/0430/5944/5914/files/android_studio_button_onclick_not_working.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_off00004c43.bin
06ceb7194328f03c2be85923ff0bb80609cd2507b0dfd0f41622de3bd46bab15
pdf-font-stream PDF embedded font (sfnt) at offset 0x4C43 5444 bytes
font_01_sfnt_off00005ecf.bin
ff4990d17ece5be70858e3be49a9619de5f2ebdb7d8c0477fb0952b75b536457
pdf-font-stream PDF embedded font (sfnt) at offset 0x5ECF 9008 bytes