Malicious PDF — malware analysis report

Static analysis result for SHA-256 02900eca722bd2cd…

MALICIOUS

PDF

42.8 KB Created: 2020-08-31 07:17:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 51f27a85f307a81931a492ee48626317 SHA-1: e3d1e56d3a819cef06686c04472f657011d62154 SHA-256: 02900eca722bd2cd58584d15790eaf05e045e90aef83751b6a6d4b2ad99fc89e
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary one leading to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL. This suggests an attempt to direct users to malicious infrastructure, likely for further exploitation or phishing.

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=rdr2+hungarian+half+bred
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/ea78e0_d0f46d842f924640aef893e0311fff96.pdf
    • https://static.usrfiles.com/ugd/b8c837_9c9294f1e51743b39428419b0ac1c665.pdf
    • https://static.usrfiles.com/ugd/b8c837_11d99a272e5f477d89cff1e1d3fb424c.pdf
    • https://static.usrfiles.com/ugd/b8c837_f5eccc9b80a5459c9e43c2885ebfc1c8.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/97986903010.pdf
    • https://cdn.shopify.com/s/files/1/0463/5177/7954/files/concerning_hobbits_sheet_music_boss.pdf
    • https://cdn.shopify.com/s/files/1/0437/8414/3010/files/enumeration_of_microorganisms.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/mirogagokujewezubuxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/5743/0176/files/kho_kho_simple_score_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/4310/2613/files/83580392550.pdf
    • https://static.usrfiles.com/ugd/c4ccc4_bff2007cac0b48fc8a156b980c7dbed8.pdf
    • https://static.usrfiles.com/ugd/b8c837_ebc206580f4e41639b32a3acb87238f6.pdf
    • https://static.usrfiles.com/ugd/90c678_69b5a18f66e84bbd89760076a029a074.pdf
    • https://static.usrfiles.com/ugd/d2751c_21ec3bae968045969e62d60013ed1d77.pdf
    • https://static.usrfiles.com/ugd/4f270c_78c8ebf740d6490194c1e8953e1615f8.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005be2.bin
fe54c43d2de96d2ad99799f59c41f28004e443d0a7c7225485df7194c605f1f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE2 4964 bytes
font_01_sfnt_off00006cb0.bin
03a93c722b87ba33975f5fcce378b91b6750c7b26dabc2b2e636f580676c94e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CB0 10408 bytes
font_02_sfnt_off0000904c.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x904C 4324 bytes

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