Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6ab620253b880c…

MALICIOUS

PDF

38.6 KB Created: 2020-08-21 05:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b62db5791f0505fb9a2fd8cbf3a0f81e SHA-1: 40ea2f8f58c93f8303ee60a853e23298766343c8 SHA-256: 0a6ab620253b880cbb9d8d2b8c9f9f9fba412919a2564c2cdfd8495a47d18588
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains text suggesting a 'study guide' lure, and the embedded URLs are consistent with a phishing or scam attempt. The ML classifier strongly indicates 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/pify?keyword=administrative+staff+analyst+study+guide+pdf In PDF document text
    • http://xudurip.omanflorafauna.com/uploads/1/3/0/7/130739169/3592476.pdfIn PDF document text
    • http://files.bookworldtravel.com/uploads/1/3/1/3/131379894/teturegifusi.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/1/0434/7985/9366/files/56048906133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1317/6469/files/arthritis_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4871/3896/files/seoul_subway_map_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0845/0972/files/3d_wire_bending_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9887/3762/files/mogaza.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2243/3953/files/gepetifikoviwisiwekum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9866/9220/files/pdf_to_word_macbook_air.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8661/files/29268505244.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/autodesk_fusion_360_tutorial.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 1

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_off0000577a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x577A 5512 bytes
SHA-256: 77723ec24e0b736b226bb31a28a1cd391120aff5bf6225ba2dcbbb03b01eb261
font_01_sfnt_off00006a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2B 10580 bytes
SHA-256: 88dfeb5e299590d9757c8a8546d33d443160dc5d5452ae1cb2be3f519ed73d3b

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