Malicious PDF — malware analysis report

Static analysis result for SHA-256 c485c67743d6e533…

MALICIOUS

PDF

39.6 KB Created: 2020-08-17 02:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7894f9e5d18d21652c1de62c254b9af SHA-1: 47203ec0f4acbce80d89e580fd65b85c1e36c200 SHA-256: c485c67743d6e5332a1ba3abc798fef1652b86b17d113f1ac29e3a8ac62b1e1d
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggered the redirector heuristic. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning technique to distribute malicious content. 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=us+fed+balance+sheet+normalization In PDF document text
    • http://files.comesailingcharterschicago.com/uploads/1/3/2/7/132710565/9360590.pdfIn PDF document text
    • http://files.thealpacacottage.com/uploads/1/3/0/7/130740149/67d484df6.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/1/0432/8315/3056/files/how_to_make_italics_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9241/0525/files/background_eraser_apk_premium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5376/9126/files/bleacher_report_app_comments.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/lenubijajimiparujogo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1236/6231/files/lunuzoxuzasuli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3899/7665/files/jejira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6980/9564/files/81129174823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8384/8097/files/70034420298.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6871/0309/files/gobiba.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_off00005d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 5440 bytes
SHA-256: 5ce0bd6e02a6c32bac46790c21bcb4cc363c953fc1918028a4e880137f0d61ac
font_01_sfnt_off00006fa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA4 10124 bytes
SHA-256: 018298ca6f9c2bd74cd9409d962beebf473c5895d097a4022287fd0ceba65729

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