Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd41f021aff86b9b…

MALICIOUS

PDF

46.0 KB Created: 2020-08-03 08:28:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: aedd9e82859122aa9c4ccb08a88c505c SHA-1: 3efe0da0083188ef1a412bcf468b2648e23aa642 SHA-256: cd41f021aff86b9b82f99316fe2f88a1917b67590c20ca92418b5e5f249baeaf
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate documents, but the primary URL redirects to a known malicious infrastructure. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates the initial URL is a redirector. The PDF_SEO_LINK_FARM heuristic shows the document contains numerous external links, likely to manipulate search engine results and distribute malicious content. The ML_NYX_PDF_MALICIOUS score further 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.ru/pify?keyword=design+of+wood+structures+7th+edition+pdf In PDF document text
    • http://files.arcanagardens.com/uploads/1/3/0/7/130739648/zewuwexo-wefogenutuvun-vitelof.pdfIn PDF document text
    • http://files.marlboroughcoop.org/uploads/1/3/2/3/132303337/8700833.pdfIn PDF document text
    • http://files.mygcstm.com/uploads/1/3/0/8/130874614/vilinoda_nujam_vidovi_lepopuwi.pdfIn PDF document text
    • http://files.littlelambscreche.com/uploads/1/3/0/7/130775868/morasimuvu.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/1/0439/2304/6568/files/25016806939.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6526/9669/files/12576711786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6479/5044/files/xorotufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4615/1078/files/zonowuzimaforuzavajexumo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/kolubudadomotogan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/fipobovobavuxebemuvum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9276/2017/files/koxebijogabilatiris.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/71308538217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/57176191522.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/vutumuzesifuta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7787/6377/files/68603813094.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 6

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_off0000697b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x697B 5228 bytes
SHA-256: 0a745e609954744a098b2b84c6b29caa6476dc73f101e47a7962b9d14803dc11
font_01_sfnt_off00007b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5A 9816 bytes
SHA-256: e7bb3fb555ab8208e37ffb1b1f160ce914e18161a59df24b9536572263c69ee7
font_02_sfnt_off00009d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D01 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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