Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c7b65f377aef44…

MALICIOUS

PDF

35.6 KB Created: 2020-08-23 15:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 961a5f931454a6bbe090b0915dd5cd4a SHA-1: 5555069ac977266d6f59f8a69bb9d1944251d41a SHA-256: 84c7b65f377aef442885f446da97d10a6d0d9068ebbfaacfa1164d5fd4ccd2f4
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links, with a primary redirector URL identified as malicious. The heuristic firings indicate the PDF is designed as a link farm, likely to distribute malicious content or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF.

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.cc/pify?keyword=instagram+frame+template+png In PDF document text
    • http://files.sheslayybyrenee.com/uploads/1/3/0/7/130740591/9150687.pdfIn PDF document text
    • http://files.didsburyjuniors.com/uploads/1/3/2/6/132681824/maxipupamekep.pdfIn PDF document text
    • http://files.helpinghandsrescue.org/uploads/1/3/0/8/130813132/8563716.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/1/0430/5967/5290/files/vegifujaramilobokafom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4015/2479/files/driver_brightness_control_windows_8.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3935/0181/files/denizaxubezipikaxidaweke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1624/0807/files/e_teamz_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9550/4536/files/kayla_fitness.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1501/2511/files/viral_pathogenicity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3869/5846/files/88398668748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4885/2904/files/migos_one_time_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/fiborovobomidigikepu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5371 5160 bytes
SHA-256: 516577ca33441546e258473e28137d10d8fe10ebbc3305665f8d3a8539761fe3
font_01_sfnt_off000064e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E1 8424 bytes
SHA-256: b03795ed4dc8463c69e2f8bb75b0c40b9e375e12a55b9fc74fc0e818822a4a13

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