Malicious PDF — malware analysis report

Static analysis result for SHA-256 423fcb28f2d453d3…

MALICIOUS

PDF

51.2 KB Created: 2020-08-05 23:32:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 93f680875a3da37ef812a561fb55dc1e SHA-1: 0819770e33de73d46a61851c2045941a371d6b8c SHA-256: 423fcb28f2d453d3818b6ae1f57707b8731c8b49fa45cff51c43eb0d6bbcb73a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=can+i+search+a+pdf+document'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with 'https://cdn.shopify.com/s/files/1/0434/9768/5157/files/73645396056.pdf' being a prominent example. The document body, though heavily obfuscated, contains the redirector URL, suggesting the primary intent is to redirect users 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.com/pify?keyword=can+i+search+a+pdf+document In PDF document text
    • http://files.northridgeoptimist.org/uploads/1/3/1/4/131483830/4810789.pdfIn PDF document text
    • http://files.rotarykwinanafurnitureonline.com/uploads/1/3/2/6/132681415/1d721c12f8199b.pdfIn PDF document text
    • http://files.amoryshelter.com/uploads/1/3/1/3/131398367/mipiwovomemi.pdfIn PDF document text
    • http://kupewu.tccoloradocup.com/uploads/1/3/0/8/130814017/6c923fcdb0.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/1/0434/9768/5157/files/73645396056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/gadedewadut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5921/4501/files/yekaterina_makrova_porn_star.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6649/0006/files/vowepefinimivunaxoteno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0201/9487/files/10231853797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1294/8121/files/dososuxolefuvovanosofi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6026/5117/files/23820369579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4605/0714/files/how_to_encrypt_a_folder_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3811/3955/files/vokesetebuzilunufovixuli.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_off00008375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8375 5268 bytes
SHA-256: bf63f1fcc2f791baf7988914842f44de0709f3e2415f4b4d7e4148efb726d309
font_01_sfnt_off00009536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9536 13388 bytes
SHA-256: a4f00d20fb2af7eade78ca8bce8b4785992cf53e578efdb5ef867e16a4da9330

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