Malicious PDF — malware analysis report

Static analysis result for SHA-256 81786d2ccad6e76e…

MALICIOUS

PDF

36.9 KB Created: 2020-08-17 09:54:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a9ca4b1d05df1939b7415365484dba3b SHA-1: 0254aa39eafcb53f0fef76a06010e11a605000a9 SHA-256: 81786d2ccad6e76e1fdcbbfdc644213eddb3718928c0d1b9f482626371163fd2
214 Risk Score

Malware Insights

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

This PDF file contains multiple embedded links, including one pointing to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to 'Cedars Sinai maternity pre admission form', indicating a phishing or social engineering attempt. The presence of numerous external PDF links, some leading to potentially benign Shopify URLs and others to unknown domains, further supports the malicious intent, likely to distribute further payloads or redirect users to malicious sites.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=cedars+sinai+maternity+pre+admission+form In PDF document text
    • http://files.thevoiceofhaltom.org/uploads/1/3/1/4/131438111/b58634.pdfIn PDF document text
    • http://files.ninelivestwine.com/uploads/1/3/0/8/130874629/vezik_gunefitotokek.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/1/0430/4230/8250/files/directional_hypothesis_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6278/7237/files/jezozavogisinepigesidap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4115/2421/files/2682000070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2567/7982/files/jevido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6550/0060/files/52560898066.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4281/5643/files/xinap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6572/1503/files/67226505341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7405/9430/files/gezoxowotixude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9495/7470/files/26290009291.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4959/9644/files/printable_blank_monthly_calendar.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_off00005363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5363 5160 bytes
SHA-256: 5a766be9e485e9e44210b72edf39a0bafd37c58526eeb4c0e03d289e2edfd37d
font_01_sfnt_off000064e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 9816 bytes
SHA-256: 5ec4ba7443b65a3b63a8d220c69d60ef93d333a2ce471ffbd7937a28408a27a0

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