Malicious PDF — malware analysis report

Static analysis result for SHA-256 21885969508bd8bc…

MALICIOUS

PDF

41.2 KB Created: 2020-08-22 05:14:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 849ac31851861c4b5528717ed8be7bb9 SHA-1: 1501236d2b6aa2990f452a8ea619a0f2709bf415 SHA-256: 21885969508bd8bc609e5d67f66ff386760b0554d1ba58d3a29ed88687297883
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm and a specific URL pointing to a redirector, likely intended to lead the user to a phishing site or a malware download. The document body mentions 'Belastingdienst aangifte loonheffingen 2018 en', a Dutch tax declaration topic, suggesting a lure for tax-related scams. The presence of numerous external links, many hosted on Shopify, indicates a link farm designed to improve search engine ranking for malicious content.

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=belastingdienst+aangifte+loonheffingen+2018+en In PDF document text
    • http://files.biophysical-ecology.com/uploads/1/3/1/4/131406356/xivut_girusidusowele_finusagon.pdfIn PDF document text
    • http://files.flyhighlittlebunny.shop/uploads/1/3/1/3/131379443/4552009.pdfIn PDF document text
    • http://gokuwa.applied-magnetics-shop.com/uploads/1/3/1/4/131437812/gorebodelun.pdfIn PDF document text
    • http://files.juliewiegand.com/uploads/1/3/1/4/131453480/dd1b72145be5fa.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/1/0463/3873/6290/files/biwomadu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4639/6326/files/38048561777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7134/7619/files/wetuxowajurorutifuzitelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0333/0208/files/19654510420.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0449/1937/files/penukerarir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0425/4615/files/13705839777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5082/files/d_nealian_cursive_handwriting_worksheets_printable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/the_other_wes_moore_full.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_off00006243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6243 5640 bytes
SHA-256: 7c4d2e1ef3e8929e215a14550b5733e3a5ba7f5ec70749cdd9c6c50b607ce388
font_01_sfnt_off0000756d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x756D 10268 bytes
SHA-256: 13baec01ab2ab30aa9dabecfac672bd43d99b7d4e3458ab84a9f57344622137f

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