Malicious PDF — malware analysis report

Static analysis result for SHA-256 a551ff835e38bc3e…

MALICIOUS

PDF

55.3 KB Created: 2020-08-12 20:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a15b5bc2f1183e440fe77f6f10c0a112 SHA-1: 58bccc1364447caed5f6fd087b2b13c7d7422c7e SHA-256: a551ff835e38bc3e3d0da480a96a32ca358cbd24a7b658778dc34ed2c3eaa94f
194 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a tutorial download, aiming to lead users to harmful content. The ML classifier strongly supports this malicious classification. The presence of numerous external links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to improve search engine visibility 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=apache+camel+tutorial+pdf+download In PDF document text
    • http://files.firstxvperformance.com/uploads/1/3/0/8/130874276/powij-sinomi-zimekabum.pdfIn PDF document text
    • http://files.wholehealthliving.blog/uploads/1/3/0/8/130874217/tufuve-sojigobafo-dapubek.pdfIn PDF document text
    • http://files.stjohnsallegany.org/uploads/1/3/0/9/130969352/5650234.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/1/0432/5684/0354/files/how_to_delete_discord_messages_fast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3033/1040/files/go_daddy._com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/62055654417.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4529/6027/files/adobe_photoshop_portable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5495/5672/files/povuvosukoxabuvekagajoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9748/9572/files/nescafe_dolce_gusto_instruction_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6488/files/dubatijatibabexituzex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9957/8773/files/memofisuzunoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7963/8942/files/zunanajakolamoxurezetog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2038/1342/files/c._v_sample_for_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8510/2237/files/5222366445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4472/0040/files/learn_body_parts_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7228/2008/files/pixinexakusefuwure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2949/4936/files/sales_executive_cover_letter.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_off00008cb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB6 5300 bytes
SHA-256: 1a2ee140c9bb095a90c43fee645c9ae48f910494265859b0131e923aeb626a9b
font_01_sfnt_off00009ea3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EA3 15868 bytes
SHA-256: 44399879e5e2cdd695c787ee3c95aa296cb5af3bf8c12c918d3b91806535b403

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