Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf01a01e6becfd79…

MALICIOUS

PDF

37.9 KB Created: 2020-08-29 10:55:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11ce8e24df1258815de2882e093df8da SHA-1: 2797f4c733d55c28302e33587b24ac1a35891175 SHA-256: bf01a01e6becfd790619e741ca1c5da04d3e4231a220a9af7c95e040358f0508
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file contains a large number of embedded links, forming a link farm. One of these links, 'https://ttraff.cc/wix?keyword=husky+tile+saw+thd950l', points to known malicious redirector infrastructure. The document body appears to be obfuscated or corrupted, but the presence of the redirector link and the link farm strongly suggests a malicious intent, likely to lead users to phishing or malware distribution sites.

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=husky+tile+saw+thd950l
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0439/6908/5598/files/vector_cdr_file_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/1695/3751/files/xekipeno.pdf
    • https://cdn.shopify.com/s/files/1/0436/9140/9561/files/power_electronics_mohan.pdf
    • https://cdn.shopify.com/s/files/1/0429/2077/1750/files/dixoka.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/4842749181.pdf
    • https://cdn.shopify.com/s/files/1/0432/1578/2048/files/25098812639.pdf
    • https://cdn.shopify.com/s/files/1/0429/9912/0033/files/jateviwomanixiboso.pdf
    • https://cdn.shopify.com/s/files/1/0434/9070/5574/files/sijoma.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/xulubez.pdf
    • https://cdn.shopify.com/s/files/1/0433/4416/7064/files/pasela.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005488.bin
4052baccf183e93043eff2eab9c9e0cf6eedb93b176bf97e64575e5156910f8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5488 5456 bytes
font_01_sfnt_off00006720.bin
e540a0a3701b5a32be64327bf80b88d8ee170689a3f06162829380cf9e8fd556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6720 10640 bytes

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