Malicious PDF — malware analysis report

Static analysis result for SHA-256 76b6aded361dadae…

MALICIOUS

PDF

38.9 KB Created: 2020-08-29 22:06:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 43f1c7e6a4fd26ece7a1dcb4bf0d7d10 SHA-1: ff355c0c3399aff071120d0ca5150299cc59f5a0 SHA-256: 76b6aded361dadaeec8a4553990e2f6d2f89e4f391517165ca85bb7ed7ecdb46
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains keywords related to farming and includes the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous external PDF links further indicates a link farm designed for SEO manipulation or traffic redirection.

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.ru/wix?keyword=energetic+rhino+beetle+farming
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/muzalematajivudam.pdf
    • https://cdn.shopify.com/s/files/1/0431/4038/2882/files/zexodumuxebejepetepizisi.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/97076270323.pdf
    • https://cdn.shopify.com/s/files/1/0440/9825/7048/files/midixinifigamigunanurat.pdf
    • https://cdn.shopify.com/s/files/1/0432/3698/2944/files/18198681320.pdf
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/greenergy_annual_report_2016.pdf
    • https://cdn.shopify.com/s/files/1/0439/0515/5240/files/92567728155.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3042/files/64560404140.pdf
    • https://static.usrfiles.com/ugd/b8c837_3cb9469624934a009d987388612724e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_d022d14d9856478c8843aa2368136461.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_off00005c0b.bin
665b690c5740d6819af69989930eebe13982ad62da8cad6c5a390d5b84f302df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C0B 5212 bytes
font_01_sfnt_off00006da0.bin
34987728df985731a8f3279d66abd9dba5cae08569ef4f3b53ef07c6cbf42d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DA0 9844 bytes

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