Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfd03f507c3d3946…

MALICIOUS

PDF

42.0 KB Created: 2020-08-25 02:39:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8522c69fa6658444b0a83bef2407646a SHA-1: 3774226bf71a30dbbc4fdce6c10327867475e5c0 SHA-256: cfd03f507c3d3946e5ffe3598fc35ce94fe0145ddddf0336bac6077fdd246161
202 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'monthly expenses excel spreadsheet template' and embeds a link that redirects to known malicious infrastructure. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to obscure the ultimate destination. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=monthly+expenses+excel+spreadsheet+template In PDF document text
    • http://files.allstaraussies.org/uploads/1/3/2/6/132695629/rexizusewode.pdfIn PDF document text
    • http://files.rykersonforkittery.org/uploads/1/3/0/7/130739742/fokapofeje.pdfIn PDF document text
    • http://files.samlyonmusic.com/uploads/1/3/1/4/131407965/mewufuzubi.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/1/0437/4288/8097/files/11382624157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2426/8968/files/assata_shakur_biography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/rijupojozux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3598/4029/files/sokixafodojobozomibaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6731/0231/files/daratet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5180/3033/files/19406724412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/delegation_in_nursing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4642/0132/files/87950799975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/60468579064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8235/7663/files/pepidar.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
🗂 Part of campaign: rykersonforkittery.org 6 samples

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_off000065f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F7 5488 bytes
SHA-256: bc24ce396bd29293e26ecc007a3f2b348ff65c221a4fdd6b04c38c62f5c34554
font_01_sfnt_off00007880.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7880 10148 bytes
SHA-256: bee82988d9c07a064ca6b3086b507fe944d23626a5cde7b48769b0dd38f68806

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