Malicious PDF — malware analysis report

Static analysis result for SHA-256 995184e01225e214…

MALICIOUS

PDF

46.2 KB Created: 2020-10-28 13:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 968f3c47757bc4a093bd87d714fe6670 SHA-1: 3934d64f00dd70338b77875eaaca6f3d3e064b51 SHA-256: 995184e01225e214917f4bbf37b6b98b7c188371d6291fcd30c0af59b815cfb2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a link to a known malicious redirector, indicating an attempt to lead the user to harmful content. The document body, though heavily obfuscated, contains the same URL and a title that appears to be a lure. The presence of a large number of external PDF links, many hosted on platforms like Shopify and Weebly, suggests a link farm or SEO manipulation tactic to distribute malicious content.

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/123?keyword=jon+%2527bowzer%2527+bauman+height In PDF document text
    • https://jonukejunuxesa.weebly.com/uploads/1/3/1/4/131409236/269267.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/1161639.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/37288358.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/1/0502/7931/7676/files/62770674549.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597eafe7-94ba-4edf-b622-69cbccefd05c/zufosutef.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/nce_secrets_study_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6875/4594/files/firestorm_comics_movies_and_tv_shows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6458/9973/files/runescape_premier_club_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2bf69b3f-537e-4a95-b3b3-7a8fcd7d3b72/kurufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9854/5562/files/notoxexudavesupifox.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/cash_flow_statement_analysis_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3616/6312/files/remember_me_this_way_sabine_durrant.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_off00007427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7427 5192 bytes
SHA-256: 74cf5cc3beb7e3b072b6d0bb9ccff82bdd8cdfa39b5c7460182d881c7fb50c5c
font_01_sfnt_off000085cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85CD 11288 bytes
SHA-256: db3106ff7a040a71feb75ec5262f29e414ab0bc1857f45128eeaa1e48e0c49cb

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