Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad099c1a3318b1a6…

MALICIOUS

PDF

51.0 KB Created: 2020-08-15 22:44:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 159001b26a43127198ecc364e7a86750 SHA-1: d7791490a8317591690ab523fa8ab53354b78a5f SHA-256: ad099c1a3318b1a6c52f2df77237b3b6e77565a7422068a86405df2458f2bbba
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector infrastructure identified as malicious. The document body, though heavily obfuscated, contains a URL that is also present in the heuristics, indicating a likely phishing or scam attempt. The presence of a link farm and a redirector suggests an effort to drive traffic to malicious sites, potentially for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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.cc/pify?keyword=narasimha+reddy+audio+songs+free In PDF document text
    • http://files.triwholehealth.com/uploads/1/3/0/7/130776273/sisuvowadusan.pdfIn PDF document text
    • http://files.northerndriveschool.com/uploads/1/3/1/6/131637562/nujewolax.pdfIn PDF document text
    • http://files.ceciliaviney.com/uploads/1/3/0/8/130874017/c596ac.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/1/0434/1117/7629/files/best_outdoor_hdtv_antenna_consumer_reports.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4625/6295/files/47227497061.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/twitter_api_post_tweet_javascript.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/5827/0101/files/brand_positioning_workshop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/ripudu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/sudilunafuduwusimubuwitif.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5504/6037/files/talagagolonotinomatezoko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/redakapumosek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/13138812829.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/puwutimebuleduverina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/latest_android_mobiles_under_5000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6197/6994/files/22691756454.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 4

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_off00007f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F43 5360 bytes
SHA-256: 2047d2b441892bac0c9a28964d13207c3cfe716f48d4786610092ac575f55ce6
font_01_sfnt_off00009160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9160 14632 bytes
SHA-256: e6361f4442795b18079538d1d045068101cd45041790a6b3bcb56892fadd3525

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