Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7c6223ae1141f37…

MALICIOUS

PDF

50.5 KB Created: 2020-09-09 04:58:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 45ff23ea5b01e79542e6848418ec4db9 SHA-1: 1ab3ea64ce1a2709ab7072ebe636d5539040a230 SHA-256: f7c6223ae1141f374e559cc9cbd3d4a465e2492f3b2af7a5e4aa8a253da6e98f
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an attempt to obscure the true destination or distribute malicious content. The document body, though heavily obfuscated, contains the malicious URL, indicating a likely phishing or malware distribution attempt.

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.me/wix?keyword=alta+autonomo+colaborador+pdf In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/69695d_a8884367a5d74a38b0ee3138308f8f9b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/430cb2_72b2ba988a1c48ad86e9452a22215b69.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/963627_ffe0ef46f0974776837225ff7b66a8d8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/c8a981_7efd1b3915534d3d92a4e463ef2cb96d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_b313174be6ba4f059e0114ab05a34c35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/95089d_d7dd42a016334a7286723f0e0259823f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4a829_072f5300df914dfaa65ad40bc6e7a445.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d78803_26075ac21aba4e099e8d03161ac9e70e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1f2646_b6024a9e40da44f6b5a45a565890911b.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2022/2627/files/wixomasijadar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/7422236992.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2160/4763/files/woxuvejibezasawokopipukaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/pc_browser_free_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5833/7694/files/pdf_ke_word_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2286/0956/files/wozerunoxemabo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/guide_du_routard_australie_forum.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64CB 5252 bytes
SHA-256: 8724151fafc26e7f9304a85903998cf679a571470d4cbf9f339a0afa30828960
font_01_sfnt_off00007687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7687 2372 bytes
SHA-256: a5f4bdb64b781530226f50f7835996d53e27f271b775652eb7d71a1538fbd80d
font_02_sfnt_off000080d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D6 11048 bytes
SHA-256: 612e870bb242e18c4e456201ce7cd05c46fc64032f3821e7f95d0ac0ca6c8b73
font_03_sfnt_off0000a51c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA51C 16312 bytes
SHA-256: 975089639afea594160f6daa1ae948ffc4125994d61a9fd32dce02580f7b6b15

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