Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5784807ba1e8090…

MALICIOUS

PDF

39.5 KB Created: 2020-08-05 10:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 28731fe3dd258785f4ecf2225a45541e SHA-1: 59046a87958674e1cabd88211486cc2bd76bbe38 SHA-256: b5784807ba1e80905df1e41b0d1c453c7704f15a2bfbc50b95bb6ba29d6132af
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.cc/pify?keyword=auxiliary+verb+worksheets+pdf'. This suggests a phishing or scam attempt disguised as educational content. The ML classifier strongly 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.cc/pify?keyword=auxiliary+verb+worksheets+pdf In PDF document text
    • http://files.cassandracyril.com/uploads/1/3/0/7/130740148/7f0a1bc.pdfIn PDF document text
    • http://jezeb.unikzhi.com/uploads/1/3/1/3/131383544/gaxijifunalivano.pdfIn PDF document text
    • http://files.garyscocktailmuddlers.com/uploads/1/3/0/7/130776402/3f8f83249f9f6.pdfIn PDF document text
    • http://files.doulaolympia.com/uploads/1/3/1/6/131607683/2202027.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/1/0440/2449/6286/files/gekuforupobataluzikobewa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/43228337302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/14981909947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7281/4245/files/25853772508.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1639/4648/files/bukesamafo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9255/7467/files/sikini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7973/8278/files/43736269803.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2452/1128/files/35114781851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8642/9861/files/99902224807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9948/8410/files/58624413319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/8150363169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7394/6275/files/97402353352.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 4

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_off00005bbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BBD 5644 bytes
SHA-256: 0b94889f48b1cd32ec5258e681edf0666d761b96a28282767e1275db57dcea04
font_01_sfnt_off00006f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F01 9964 bytes
SHA-256: ab41efe594ea81bf39edc46d6c6cbef3656e76d40c7f0bb487b2189320b78435

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