Malicious PDF — malware analysis report

Static analysis result for SHA-256 a67cbaa1611399af…

MALICIOUS

PDF

40.2 KB Created: 2020-09-13 18:59:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: edb4b8e1c64e9d1239ba60ef66b433e9 SHA-1: 8b2423a3d5cf9a0da8dc0e335f962a5475de06e7 SHA-256: a67cbaa1611399af23292201658fe6256411fce1344cddfd02055a4ca202515f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, including a known malicious redirector at 'https://ttraff.com/wix?keyword=quote+sandwich+activity'. This indicates an attempt to direct users to malicious sites, likely for phishing or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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.com/wix?keyword=quote+sandwich+activity In PDF document text
    • http://files.leescrossroadmbc.com/uploads/1/3/1/4/131453415/6aae3c25.pdfIn PDF document text
    • http://pemawab.baker-realty.com/uploads/1/3/1/3/131384380/mejuvowi.pdfIn 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/1/0430/4257/0401/files/bolenokelij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3137/8590/files/nudevumilugeliju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/56850693501.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9757e7_764c554826a843bba7987c3c3e5cf9d4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e16aa_c67ee138a29b445c8b99d6d288afec7b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9219f8_74b98e2a1aa1455ba6add309a405d430.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8a6048dbb0ca424ebf1ff9e8cf645d5b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ce5d00_f7cae8d910104cde8825f1ce6ba81dc4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d5cf39_822fc242c66b480a80e0d36308bec77e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/5a1791_5c69c4d271be47cb8773120d335d6e35.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a01749_3fa30948e4d44081ac0b4eb61daae19f.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7be1cd_e3d2f7100cbb4dc9a5e7d16f7c86e0a4.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_off00006002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6002 5216 bytes
SHA-256: 77dc6510f857719fac0826247734b5312bd73348e3069a73f7ebb6f1b4435725
font_01_sfnt_off000071dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71DC 10044 bytes
SHA-256: eaa5ca7cbf3aef09cc9556b9e1740471224a73ba73cdb679b6c29bfe1b322251

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