Malicious PDF — malware analysis report

Static analysis result for SHA-256 15b8f46da078bd02…

MALICIOUS

PDF

37.5 KB Created: 2020-11-01 04:22:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: cd68c0a62cdf8951b61735af0ed969c4 SHA-1: 90f3765b4598f34d91026b4d94ed787180f734c8 SHA-256: 15b8f46da078bd0211df6f5956a73f85b9d9b8d367aad0e844d73082ba8566ad
154 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources, including a known malicious redirector. The document body, though heavily obfuscated, contains references to 'Atascadero school district' and URLs, suggesting a lure to phishing or scam content. The presence of numerous PDF links, including a link to a potentially malicious redirector, indicates an attempt to drive traffic to malicious infrastructure.

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://ggtraff.ru/123?keyword=atascadero+school+district In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5f9e0f7319f69.pdfIn PDF document text
    • https://luvupomadimudux.weebly.com/uploads/1/3/4/3/134350134/fobogod-jizituve-pepuzuwa-wufaluf.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/1/0498/7951/5291/files/south_park_game_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/zijipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/7255/9550/files/5115215714.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/baritone_ukulele_tab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/6602/9743/files/operational_risk_management_steps.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/71375440057.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/85267460858.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/gemupemutu.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_off000056d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56D9 5016 bytes
SHA-256: 2f9327142b18cbae70a2164008619119095cac5e4db7d223768826bfdc0d9bef
font_01_sfnt_off000067de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67DE 9976 bytes
SHA-256: 9d2a370a5cac80994f1466e9c55deb8dadc4c2c2811cc744b965041da58cb0e6

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