Malicious PDF — malware analysis report

Static analysis result for SHA-256 776419faffaa35d1…

MALICIOUS

PDF

43.3 KB Created: 2020-07-30 09:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e552504ebfa4d8713e89face7eb22c3c SHA-1: de28bfa704c3b9896546f8b9ebc36200a9244baa SHA-256: 776419faffaa35d1ea54f0c24be5526f5c41004c2a61f5692633192b2e769802
194 Risk Score

Malware Insights

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

The PDF contains multiple links, including one to a known malicious redirector, suggesting a phishing or malware distribution attempt. The heuristic firings indicate the PDF is designed to link to external resources, likely for SEO manipulation or to host malicious content. Although no scripts were extracted, the presence of embedded URLs and the ML classifier's high confidence score point to malicious intent.

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=artificial+intelligence+course+material.+pdf In PDF document text
    • http://files.swegas.com/uploads/1/3/1/3/131380583/gipegomaxuriberawun.pdfIn PDF document text
    • http://files.jcneedles.com/uploads/1/3/1/4/131452903/boteverejeben-jekejuxi-bivodu-bakedumapej.pdfIn PDF document text
    • http://files.sawmlian.com/uploads/1/3/1/6/131607712/vutejepasaratoz_nikan.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/1/0428/9835/8432/files/32878299647.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5632/3995/files/xopukuxotutoserurilafevo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3354/9205/files/85065553815.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6971/9196/files/gofene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/1492477467.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4636/2533/files/12164387122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4274/3207/files/nixulonetivililiveti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9877/6487/files/bipozipazenanaxomagumow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4996/6998/files/zajeguwuzen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/65545430121.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/vozapuremifuluserexew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/savekujaligawides.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_off00006a72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A72 5380 bytes
SHA-256: 9b139a5aa0310af95ed41e0eaca0c23cc64cc7e1b318e2e337d63d9bf86571f4
font_01_sfnt_off00007c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C9D 10384 bytes
SHA-256: 9119c7d26326c84c654cd7036e8711350c2b4efe14d78259dcfece9fc21e2f37

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