Malicious PDF — malware analysis report

Static analysis result for SHA-256 e835d99389cd0708…

MALICIOUS

PDF

45.3 KB Created: 2020-09-12 09:03:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dbc6adba2357f554a8e4f0b3f3935b00 SHA-1: 8d3eec097443b0c97bd8006b887472c7f1e4db59 SHA-256: e835d99389cd070868ff9074bc2175c0d4dd251f5ca70e8509f57957e5b9fa9e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic firing indicating it's a malicious redirector. The document body, though partially corrupted, contains text suggesting a lure related to 'coping skills worksheets for mental health' and includes the primary malicious URL. The ML classifier also strongly indicated maliciousness. The sample appears to be a link farm designed to redirect users to malicious sites.

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.me/wix?keyword=coping+skills+worksheets+for+mental+health In PDF document text
    • http://files.tmoonphotography.com/uploads/1/3/0/7/130776655/ratepu.pdfIn PDF document text
    • http://ledupavax.rhymebaby.com/uploads/1/3/2/8/132814930/3c68c4043a.pdfIn PDF document text
    • http://files.risehairinc.com/uploads/1/3/0/7/130738845/5caaba53c.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/1/0430/0252/7895/files/36496802683.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3139/1396/files/59489891143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7230/6843/files/12346953965.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5eed99d82ee74410ab42ccda4f97eaf5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9fc8c3_035060c5945f4fc4abe29f2efcff92e1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_854ccda3cc304d0586db2b2da9a270c3.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/87fdc7_a776f3f8cece4e42a03a1221e39c4e60.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7cefa9_40430abfe6c84e24b135392f730b7592.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/120f26_e6a4574c13d7404485dc1782b5b6c557.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4ca7f5_6033b775e37b49d6bf4cf9924c75d183.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9bd8c3_d0bde2259fca407ca3bcd114e1f36115.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_off00007260.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7260 5376 bytes
SHA-256: fe6f8a2c0a8b68367e75d8e7c5aa0caad78649894793c0323cadd15d54a333f7
font_01_sfnt_off00008494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 10464 bytes
SHA-256: ae60a9130d6de83e9b9a35b944e744bfdf69ea50b895c6c3f6b1ad17019e75a6

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