Malicious PDF — malware analysis report

Static analysis result for SHA-256 81268e4d02f215d8…

MALICIOUS

PDF

36.4 KB Created: 2020-08-19 21:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b498d60cfe71d6f8e3e65b53ef8b899f SHA-1: 35eeb318a243e30e66c710cf33a77530e5afdaa6 SHA-256: 81268e4d02f215d8d0b5015d3cc14b28dbb3448476b56baad4dea73fe2077480
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to redirector infrastructure. The document body text, though garbled, includes a URL that is also present in the heuristics as a malicious redirector. This suggests the document is designed to trick users into clicking malicious links, likely for phishing or malware distribution.

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=avery+18160+label+template+for+mac In PDF document text
    • http://files.dtbellevue.com/uploads/1/3/0/7/130776503/badatisizifusam_befinatodubu_vixojijasox_wazezozitaju.pdfIn PDF document text
    • http://files.diamondmarvelsengraving.com/uploads/1/3/2/7/132710491/duliginudufinigupo.pdfIn PDF document text
    • http://files.youliedance.com/uploads/1/3/0/7/130739076/tibobebog.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/1/0428/9508/1635/files/renudul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3249/4751/files/xubegavuvuzoxiponiwuluz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2312/8986/files/critical_care_medicine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/tebiwobufubunavekefibuzaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7080/7461/files/21187877509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/kigetevikoxamoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/lakelitawab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4283/9455/files/antivenom_production.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/dr_oz_weight_loss_smoothie_recipes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3061/8011/files/rumukavigip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7631/2471/files/funidasijolowen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/pipoxukalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3243/7158/files/bomiziponowegiso.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_off00004e9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9B 5816 bytes
SHA-256: 650cb4dd1ee9ab36256d89850abe29bef5f45b86172b7cd8c1845b56979c56df
font_01_sfnt_off00006264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6264 10140 bytes
SHA-256: 78fa4adbe2d7fd61c35f763b331d369f0e0ca027be0f85e02fe659f2b29b2f3a

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