Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d379d36863db89…

MALICIOUS

PDF

38.7 KB Created: 2020-09-11 17:51:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: fe8dd0775dea7107ce0f018ee452fd81 SHA-1: 2a961532b10bc524ffbf6c63a762f745ffe38eac SHA-256: 60d379d36863db898be9ba6ebdb59433a1c7673dacfa6277586ca8ee56d35b4a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one prominent URL identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate malicious intent. The document body, though heavily obfuscated, contains the same redirector URL, suggesting it's the primary lure. The ML classifier also flagged this PDF with high confidence.

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.club/wix?keyword=adobe+encore+cs5+menu+templates In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/45839825904.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/standard_email_format_validation_in_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6147/6504/files/veposojojatunada.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b0b521_87833972fceb4340b4dfd92e4a44caea.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5f226e_75cd1170cf3a43799f42d31f758abb64.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/469aea_157b0f50272d49b1ab502c0a5b647008.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/67e251_751e3018978b437480dc731a245b68d1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b42fd6_a7af0791e4d7440ca23f00f35f5594b1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7f16bd_25947cbb0508423da548dcc204611945.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/717a42_ac552a09b2214ac0b724e72293d5e9a5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/litowatava.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5540/7511/files/epileptiforme_o_que.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2889/8211/files/massey_ferguson_135_service_manual_free.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000568c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x568C 5472 bytes
SHA-256: db73e7daaf05189eced3bc2391f6529a239e1040d1db5cc4609c60b94fa878ec
font_01_sfnt_off0000690e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x690E 11152 bytes
SHA-256: 5ad8511a5c8c1ea9c8fbc78ed4c25dac9e30b723cd2ce2f67e712fd297edb1d5

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