Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b81f2fd09a5b189…

MALICIOUS

PDF

48.9 KB Created: 2020-08-02 20:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 359cd57b2a24e6ea4c303a48195446af SHA-1: 514be7021105b754c71b4108124157857760ae57 SHA-256: 8b81f2fd09a5b189aac2cac8a658a215537283c873a504b2459e4b9eedce2032
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to embedded links pointing to known malicious redirector infrastructure. The document body contains a URL that appears to be part of a link farm, with many links pointing to Shopify domains, likely for SEO manipulation or to obscure the final malicious destination. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=tool+72826+songs In PDF document text
    • http://files.freemaninsure.com/uploads/1/3/0/8/130874324/sosowor_peresixosixar_rejerugovije.pdfIn PDF document text
    • http://files.sheetmaskshop.com.au/uploads/1/3/0/7/130776883/7143677.pdfIn PDF document text
    • http://files.jplotitocompany.com/uploads/1/3/0/8/130814172/0ff6d0a.pdfIn PDF document text
    • http://files.colquitt-georgia.com/uploads/1/3/0/7/130776578/tonogopaxexi.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/1/0431/7826/2689/files/synonyms_for_collapse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7901/6360/files/pivolusawu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7235/5478/files/52072146841.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1464/2070/files/35347372362.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3151/8622/files/3955073691.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0543/6326/files/70743658341.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6645/8265/files/wopazidesenibegenaruso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0090/files/ledunuxupafajofitok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/94039615118.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/kutanedagofelexun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6873/5140/files/49875383151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4980/3166/files/46181187643.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 2

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_off00007215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7215 4252 bytes
SHA-256: 4f5f909260e72a638b573601a045db9e7a1d3de83c623e40943378318dce4617
font_01_sfnt_off0000811d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x811D 5056 bytes
SHA-256: 88b2ba74bd72f13dcea44d2a27ce8bf33cdeca7040309d86ed9632e6395d4081
font_02_sfnt_off00009274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9274 10384 bytes
SHA-256: d7c52b1906a777440440144d7bb7af60f6a27cebe07f31addf71b942f2525a43

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