Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebccff3a15e083e3…

MALICIOUS

PDF

35.6 KB Created: 2020-08-19 10:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7cbd0d5b76d93c25b1db1672cf348d6f SHA-1: c7166912e9c5ac308770de30719a94682b99e05b SHA-256: ebccff3a15e083e35302e9190dcce31e6c92ba4cdca4f4a4636a0ceb97f2397e
194 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One critical heuristic firing indicates a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=finding+consecutive+integers+worksheet', which is likely used to obscure the final malicious destination. The document body, though partially corrupted, also contains this URL and references to a worksheet, suggesting a social engineering lure to drive traffic to malicious infrastructure.

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=finding+consecutive+integers+worksheet In PDF document text
    • http://files.mobilityfamily.com/uploads/1/3/0/9/130969435/nijabaripem.pdfIn PDF document text
    • http://xalurin.tnnme.com/uploads/1/3/2/7/132740478/3836077.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/1/0428/8089/3084/files/kakufulasabolugatozezolop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2715/8424/files/wadebewupus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0166/6969/files/soxasagoxododexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9862/8501/files/75745091495.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/32764168715.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/wefobanuwuwabezobi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4977/7312/files/71149496270.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5783/0298/files/jagobujozipewarogu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7641/8720/files/authorization_letter_sample_to_process_documents.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/20470298207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0402/5243/files/computer_network_ppt_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/c_o_address_format_usps.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 3

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_off00004e1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E1B 5128 bytes
SHA-256: ea93a51abedfada945c85fa21ce3d7c658824d58468fb5521ebe2c204818df60
font_01_sfnt_off00005f9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F9E 9920 bytes
SHA-256: 4bbade3ceeb044d30f56855b693f5cff28d4c93c5f51e16db25df6d1a1783f81

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