Malicious PDF — malware analysis report

Static analysis result for SHA-256 20e4a16b726b9b1b…

MALICIOUS

PDF

35.1 KB Created: 2020-08-14 05:55:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93ae0fe2baa0c474ce6131fc668e5a50 SHA-1: 25d40ac246736fc4d7fae230cc3425919902be39 SHA-256: 20e4a16b726b9b1b4a37a8e1d8fbbf0203152bf8ac685a557efe4a0c60e4c81f
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=problem+solving+worksheets+for+kindergarten`. This indicates the document is designed to redirect users to potentially harmful content. Additionally, a PDF link farm heuristic suggests the document is part of a larger SEO manipulation scheme to distribute malicious links. The document body, though partially corrupted, contains references to the redirector URL and other URLs hosted on Shopify and custom domains, some of which are flagged as benign but others are unknown.

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=problem+solving+worksheets+for+kindergarten In PDF document text
    • http://files.twosisterscandy.com/uploads/1/3/1/4/131407647/4503ec.pdfIn PDF document text
    • http://files.maderavistatownhouses.com/uploads/1/3/1/6/131607712/67ccb1825f.pdfIn PDF document text
    • http://files.craigheadcountyveterans.org/uploads/1/3/1/4/131438274/zikarotijuva.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/1/0432/3206/7748/files/mokakabomokujawukix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/87471806153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/google_sheets_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/fixokekiranomasakuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5378/3957/files/juwodaduwuxeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9690/7678/files/71108163178.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2353/1175/files/genawudep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9438/3522/files/synovial_fluid_composition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2710/1853/files/xotegebiguteji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/beps_action_9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/alcohol_phenol_and_ether_ncert_solution_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/zuzizegopuwabulisibutik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8699/3813/files/21946307383.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004ac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AC8 5676 bytes
SHA-256: 80f64223506ddfdce2c4a4f7f394c97535e465ae4a27f549b46041cc21ff86ed
font_01_sfnt_off00005df4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF4 9856 bytes
SHA-256: 01189c122252ec31c49c65fef83807d7d3e8d5a0a305a2c4f5d3a527900601fd