Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcfc98a3d916a29…

MALICIOUS

PDF

48.8 KB Created: 2020-08-18 15:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28b2961c8e485037033884b9ce5ee8c1 SHA-1: 490590d4f148915ed4d7eb165d191a3de0eecdda SHA-256: 7bcfc98a3d916a2957a9632ee6627f46cb8c78bd25a2e016a5039746a08fb450
202 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious infrastructure. The embedded URL and the 'SE_DOWNLOAD_BUTTON' heuristic point towards a phishing or malware distribution lure. The ML classifier strongly flagged this PDF as malicious.

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.cc/pify?keyword=good+table+manners+worksheet In PDF document text
    • http://files.deepsouthbasketball.ca/uploads/1/3/0/7/130740011/bivonotinada-jigip-jevebiru.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/1/0431/6302/5559/files/article_a_an_the_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8667/5109/files/50783931066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/17120663053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/5968/0156/files/53289383686.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/jarevoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/xujaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9200/9365/files/57723821949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/75077005370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/36102079880.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4184/1575/files/50180914799.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1141/4943/files/wosukotagip.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_off00007aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA4 5392 bytes
SHA-256: 2a4b5167560e9a0b995e3e8ab5f13c973973b28628dd48b11c7fd2c3fa34ba5e
font_01_sfnt_off00008ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 12868 bytes
SHA-256: 242ace84bd868f9b3fcfa5bdba041b2f7f8a1d1497b0c547665c22795ae735b2

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