Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4da1a609b41419f…

MALICIOUS

PDF

34.0 KB Created: 2020-08-22 02:46:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a4e9ecada60d53954f9da28da0fc9375 SHA-1: 93817bdd16243c1fd36cab92622fe6390bf7e9f5 SHA-256: e4da1a609b41419fe156e9d3aa8779083e8bc071f19a046c2b4c1763bada3d35
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a product manual and the malicious URL. This suggests the PDF is designed to lure users into clicking the malicious link, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=beko+cfp1691w+50%252F+50+fridge+freezer+manual
    • http://files.androscogginswcd.org/uploads/1/3/1/1/131163872/f28c65.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5667/files/netflix_ad_free_apk.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/bloomsbury_harry_potter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/1897/7443/files/18427152920.pdf
    • https://cdn.shopify.com/s/files/1/0460/3025/8335/files/wow_warlock_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0436/9596/4328/files/roxubuxodomirosataza.pdf
    • https://cdn.shopify.com/s/files/1/0430/9758/7861/files/nevatumafiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8548/8543/files/dudofuwumuvalirik.pdf
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/76348542269.pdf
    • https://cdn.shopify.com/s/files/1/0427/4189/1238/files/12525240135.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2123/files/25486054687.pdf
    • https://cdn.shopify.com/s/files/1/0435/4965/5203/files/soxetujogomisurol.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_off00004465.bin
076afdee61f63c27c1cedcea1f2311f156c20604b01dfa06a89cbc2a0fe9cb07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4465 6216 bytes
font_01_sfnt_off000059a3.bin
9421a9fefacb850dff421f05782451234ee63f2b7f836460e886b8a4ebd49bc3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59A3 9440 bytes

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