Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebecbd34c4b7c0d1…

MALICIOUS

PDF

47.7 KB Created: 2020-08-14 10:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a4f49fa763554af70189387e351a4f8b SHA-1: cf2ab76cef992ecd09ea598722e94b8c9369293f SHA-256: ebecbd34c4b7c0d18dbe366e7a48f7d966669e416c473e7f8d2aca25bd2c7cbd
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to benign Shopify URLs but ultimately leading to a malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains text related to 'cladogram analysis worksheet pdf answers' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=cladogram%20analysis%20worksheet%20pdf%20answers In PDF document text
    • http://files.resourceology360.com/uploads/1/3/1/8/131858661/665f51d.pdfIn PDF document text
    • http://files.prwmassage.com/uploads/1/3/0/7/130739758/3594519.pdfIn PDF document text
    • http://sitejal.nurtureandnature.org/uploads/1/3/2/7/132712615/lowedex.pdfIn PDF document text
    • http://files.evlr.co.uk/uploads/1/3/0/9/130969505/d345420a98c58b.pdfIn PDF document text
    • http://files.ummahcharms.com/uploads/1/3/0/8/130874035/7459399.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/1/0437/1929/5130/files/benibepaniwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0416/6297/files/allahabad_high_court_aro_result.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9616/9886/files/gebibaxokamatozibufazul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4981/0080/files/renokidisiretiweji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8071/1325/files/kegodo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3139/5478/files/lepomatagazusugepozuri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/27765440668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/4516/2903/files/lexus_is250_repair_manual_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8770/6774/files/safazovotariparidi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0427/1524/files/korafamamodubaneligid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3217/2951/files/autoestima_psicologia.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 5

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_off00007933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7933 5620 bytes
SHA-256: edc11d1b89d507c03901c12625dac8f0a611e0fa25f9b10f6c900ce7a5981e6a
font_01_sfnt_off00008c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C41 11372 bytes
SHA-256: 58131cfa6a1f1419eca26e2709038f639682e0d031ae2bbae5b76891fa5a9aa6

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