Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef660f75b7bea079…

MALICIOUS

PDF

40.8 KB Created: 2020-08-18 16:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0684aef3c5aba1304982fbdaf6ec9c3b SHA-1: 4292f5ae815799e4ef604a453187fa392c3b559b SHA-256: ef660f75b7bea0799a40d2d8552e9edf19b681342fb2a52578184138923ab455
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also assigned a very high probability of maliciousness. The document body contains a URL that points to a known malicious redirector, likely intended to lure users into clicking through to a compromised site. The presence of numerous embedded links, many pointing to Shopify domains but also including suspicious custom domains, suggests a broad distribution attempt.

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/pify?keyword=tracheostomy+care+video In PDF document text
    • http://mabod.cityreachswissvale.org/uploads/1/3/1/4/131437502/8650411.pdfIn PDF document text
    • http://nubise.ksonstruck.com/uploads/1/3/0/8/130813694/maramanedot-filozo-mufipeteke-rosiveg.pdfIn PDF document text
    • http://files.stitchesbylynsey.com/uploads/1/3/0/7/130738499/7513939f.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/1/0429/5681/6540/files/quicksort_median_of_three.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72707516801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/89402534875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5429/1354/files/business_model_generation_arabic.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/17232613021.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5926/3126/files/16_point_compass_directions_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3119/1975/files/bibonofos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/guide_to_getting_it_on.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0894/1467/files/pathfinder_beginner_box.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3197/7369/files/31030878996.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_off000062d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D4 5256 bytes
SHA-256: c9f8fd1d56dcfda814c8ae5f988632296a630f89c403a15a67dca5c2765f7a3b
font_01_sfnt_off00007494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 10272 bytes
SHA-256: f6a4eebeedf01692ccdf09d0545d9717733582abd1eb6109115f6d84550225a9

Open this report in the interactive analyzer, or submit your own file for analysis.