Malicious PDF — malware analysis report

Static analysis result for SHA-256 12b39d5572a52bb3…

MALICIOUS

PDF

45.0 KB Created: 2020-08-04 03:30:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7bc2131a32a72dd4325417b62adfd779 SHA-1: 71c44a7ecfa8f21a368696b7b8e5e9cb557925ad SHA-256: 12b39d5572a52bb3009dc29058a9a4078b8d0d7b68b75823087caaf4e44a5a93
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a large number of embedded links, many of which point to a redirector service designed to obscure the final destination. The primary redirector URL is https://ttraff.com/pify?keyword=class+diagram+problems+and+solutions+pdf, which is known to lead to malicious infrastructure. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking it for a purported 'class diagram problems and solutions pdf'. No scripts were extracted, but the presence of numerous links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

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=class+diagram+problems+and+solutions+pdf In PDF document text
    • http://files.hummingbirdmedicineboise.com/uploads/1/3/0/7/130775828/6eeef6619c2a6b.pdfIn PDF document text
    • http://files.hernanbrizuelatango.com/uploads/1/3/2/7/132740743/8798325.pdfIn PDF document text
    • http://files.drbhatti.ie/uploads/1/3/0/7/130739430/pibabifirunaf.pdfIn PDF document text
    • http://files.nationalschoolartcollective.org/uploads/1/3/0/7/130775280/486733.pdfIn PDF document text
    • http://files.ricowhite.co.uk/uploads/1/3/0/8/130814411/8161481.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/1/0438/1537/0912/files/rorepoporonuweja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4288/2215/files/pozijejon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/17248617275.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/what_is_hardware_acceleration_chrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/how_to_delete_ark_mods.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/82495894476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/55781022724.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51025654711.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0344/3361/files/60362309666.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3160/0031/files/msp_hack_no_download_no_survey.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 7

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_off000069cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69CC 5404 bytes
SHA-256: 0d2bf2c5e040d080d8e5c00f62964211a9377c8749dfbd917978b704a66ffd70
font_01_sfnt_off00007c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0B 13520 bytes
SHA-256: 6c55bb16a75f13edf14704031053d7fd9b9be35415bafca715756231c56526ce

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