Malicious PDF — malware analysis report

Static analysis result for SHA-256 7791477a6b5fe748…

MALICIOUS

PDF

41.0 KB Created: 2020-08-18 14:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f98797b5539114e80b44850e155b736a SHA-1: c73592247e6c3c6aed5982bd3cd8a155dd19467c SHA-256: 7791477a6b5fe7488abf9e5de31c90fefb1d385316be549768de5f755b5ff351
202 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be part of a link farm designed to attract traffic. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be a lure for users seeking educational content, leading them to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/pify?keyword=printable+letters+worksheets+for+kindergarten In PDF document text
    • http://bemak.bettysbunch.com/uploads/1/3/0/8/130874197/lepovu_ronolajenigap.pdfIn PDF document text
    • http://files.whipcityshields.com/uploads/1/3/1/4/131483249/pekujoresunodas.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/1/0430/7710/7865/files/bhagavad_gita_as_it_is_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7014/4155/files/13102572757.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3124/8542/files/69739989475.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/soraleboxaxuruz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/56435749604.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/blood_relation_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/nulogoverevezalegogilupim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9281/1681/files/73161906183.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6539/2804/files/daxusuxakifew.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5464 bytes
SHA-256: 96efb51654b0d78b4c79bed321d34495f90f5ad56dc9e174da2ee6258c397a85
font_01_sfnt_off00007418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7418 10144 bytes
SHA-256: ab0b67cb36d10ce947f83b49a4cf9bda5a32a15e89ab3a35eea56683aa1b0bb0

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