Malicious PDF — malware analysis report

Static analysis result for SHA-256 6753364d8f830c65…

MALICIOUS

PDF

45.2 KB Created: 2020-08-31 08:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec26def28f2106eac65c971e1b97371a SHA-1: e0289ce4beb576880ddc2baa6f926bf03bb33aca SHA-256: 6753364d8f830c65b18110d6ab2557c8cbba9f02eff89e17b74d8c3ef6bd0ef9
162 Risk Score

Malware Insights

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

The PDF contains embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting a 'property due diligence report example' and includes a URL that appears to be part of a link farm. The presence of a malicious redirector and the lure text strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=property+due+diligence+report+example
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/daca0d_69ee1db54d1f4d5487e21324e12d400e.pdf
    • https://static.usrfiles.com/ugd/2c608b_3c87ddaec3eb412bac7cc3e9e7967d57.pdf
    • https://static.usrfiles.com/ugd/565485_fed166e524bb4ecd80070b33509bb5d7.pdf
    • https://static.usrfiles.com/ugd/8c0e65_74adbbd2e08f4675885a0328c4910a77.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6174b4b10694f6aaf6d5218462505bf.pdf
    • https://cdn.shopify.com/s/files/1/0434/1425/7820/files/63367570705.pdf
    • https://cdn.shopify.com/s/files/1/0433/0379/6894/files/35449090430.pdf
    • https://cdn.shopify.com/s/files/1/0438/6367/0939/files/recursive_sequences_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/auto_tune_evo_au_mac.pdf
    • https://static.usrfiles.com/ugd/5926b4_92b57663ad7141b39580624448bbc07e.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b90efcf3d364fdf8a2a72e895831b98.pdf
    • https://static.usrfiles.com/ugd/ac72e0_17756dcb25034fd88e4e0ed026fd0fdc.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_off0000731b.bin
b2a3ec5ff8057fa1fe43dd458a7dbfc01566fe8945c71b668eae5c442d021458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731B 5388 bytes
font_01_sfnt_off0000855e.bin
703456fa54a68057d319b70e8ae8b6d3b19bba2d960dcd2b403f675fda9d345d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x855E 10152 bytes

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