Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e1ba20e310ad46…

MALICIOUS

PDF

61.7 KB Created: 2020-08-03 20:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d794c6a655edc6072170d35c5a7d0653 SHA-1: 021260cfe5968669cfe6bf6fbab647a1b0b38951 SHA-256: 16e1ba20e310ad46574f8762bc7fd4a284a14e14cc34e463ed5b04b75d7d08bd
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, pointing to a single primary redirector URL. The ML classifier also strongly flagged this PDF. The embedded URL and the document body text both contain the same malicious redirector URL, suggesting an attempt to trick users into clicking it by presenting it as a legitimate document.

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=bankruptcy+act+1997+pdf In PDF document text
    • http://files.olneyfarmersmarket.com/uploads/1/3/1/4/131406060/banuwev.pdfIn PDF document text
    • http://files.rasaddleclublarkhill.com/uploads/1/3/1/3/131379540/613642.pdfIn PDF document text
    • http://files.eighthelementllc.com/uploads/1/3/0/8/130813846/453fca.pdfIn PDF document text
    • http://files.tuscanystudios.com/uploads/1/3/0/7/130740213/9143555.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8678/2369/files/76060100600.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/15840859115.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2562/8327/files/vowavutosale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3366/3400/files/david_deangelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2952/6688/files/60224026652.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1258/5634/files/fijitevudofejanepivigetiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1820/6888/files/19070058712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9645/7884/files/20712844659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5703/5929/files/95567728040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12509012650.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5582/3525/files/96819910603.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA843 5048 bytes
SHA-256: 82a8b7136b0ba84a1ea83d4cdbee93595592f37afc73e9b36ef2c7a22d2d3f02
font_01_sfnt_off0000b992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB992 9940 bytes
SHA-256: 11d328a6c404d060d46ae8347650f3c199e826930fbd156b7bd6b50634ae62aa
font_02_sfnt_off0000dbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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