Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81e3cd4d535a9db…

MALICIOUS

PDF

43.9 KB Created: 2020-07-27 09:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 893f885f4a644ada90e10a8ebe4b7e3f SHA-1: e9b1d7bca1d65af20823b12aa1158a90df5d6938 SHA-256: c81e3cd4d535a9db16a1c1adc172ff27c3f72217663e49bcf49414bac16e9c93
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a link farm designed to appear as a free download for CAD software, but it redirects to malicious infrastructure. The ML classifier strongly indicates maliciousness, and the presence of numerous external links, including a known malicious redirector, supports a phishing or malware distribution attempt. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.ru/pify?keyword=converter+pdf+para+dwg+autocad+2015 In PDF document text
    • http://files.staytonfol.org/uploads/1/3/2/8/132813998/lesad.pdfIn PDF document text
    • http://files.mendedhearts117.org/uploads/1/3/0/9/130969254/gevuwutexelep-susamuki.pdfIn PDF document text
    • http://files.thegeorgiaruthhouse.com/uploads/1/3/1/4/131438228/wakebuv-jujeze-vipat.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/1/0432/2181/1364/files/rajovonomumupegivedi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8951/1071/files/16593759348.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7732/1379/files/kedegiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/80053986564.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/wawemule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6631/8230/files/39770212052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/2274086869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/vidibaligofilenaxur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6670/1477/files/3490913146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9208/9759/files/96866014076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6991/4782/files/zajufat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1496/3868/files/20394672882.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0412/4580/files/bupomitaxenupopasetarivu.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 8

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_off00006c4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4F 5572 bytes
SHA-256: a97027d04a0a6c05af511ce197f83dea1e699c7b0d40d79a90386cd4d9395df0
font_01_sfnt_off00007f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F7A 10176 bytes
SHA-256: c476b1f34ad3e3083e5173fc9eeccb75c2a26a8c0fbc82fe7e62bc642eb21ab3

Open this report in the interactive analyzer, or submit your own file for analysis.