Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d9422ff35f4231…

MALICIOUS

PDF

40.2 KB Created: 2020-08-01 09:36:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 63b5fae1e316bda05c40defa8fc6ffa7 SHA-1: 1ac924acc804c63f42801e2432786ed0211d45d1 SHA-256: b8d9422ff35f4231cf32087c3c3b5ec93f47b6ecca09f1ffd5bca45f6031cf1e
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL that triggered the heuristic. The presence of a link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents. No scripts were extracted from this sample.

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=da+form+7223+1+pdf In PDF document text
    • http://files.ginamagnoliaart.com/uploads/1/3/0/7/130774962/2d662c3b4f.pdfIn PDF document text
    • http://files.lhasaapso.is/uploads/1/3/1/4/131482884/zikisunagew.pdfIn PDF document text
    • http://files.electricrailwayclubsflorida.com/uploads/1/3/1/1/131164032/9960952.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/1/0432/3957/1616/files/jebokapuzetikevisarupux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9839/7085/files/81279344550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3619/7542/files/jemaxusupijugoribolavi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5229/2513/files/sotafokevofux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/new_years_resolution_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0133/0339/files/gifejomugobodadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/19050870259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/86717948027.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2950/3908/files/sitoguleb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/6932377875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5319/5165/files/69613572653.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5800/3096/files/bexojopejiguzob.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_off00005f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F02 5404 bytes
SHA-256: 6b7bc731bb29d94c19db9b4ad3925f1d35aa9b4fbdcd3b497eec0e6dd0c55077
font_01_sfnt_off0000716b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x716B 10136 bytes
SHA-256: 034530d76deab0fececdc3aa452f9fae4bc94f12eaab20901b7904dacff5924a

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