Malicious PDF — malware analysis report

Static analysis result for SHA-256 647a529b0d1e4363…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 03:40:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b53f18261ce16f6bcf941b98893ecdc0 SHA-1: 9b844c0a1d8684b7647f44826726e6025f9bb426 SHA-256: 647a529b0d1e4363a4a9d74cbbbd65414d1ce7f699c4835392afcd6ab489378b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains a large number of embedded links, many of which point to a redirector service known for hosting malicious content. The document body, though obfuscated, contains text and URLs that suggest a lure for free downloads or exercises, which is a common tactic for phishing or malware distribution. The ML classifier strongly indicates maliciousness, and the presence of a redirector URL confirms the intent to direct users to potentially harmful sites.

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=causative+form+multiple+choice+exercises In PDF document text
    • http://files.diggingupyourrootsbyashley.com/uploads/1/3/1/3/131380008/vodunuvo.pdfIn PDF document text
    • http://files.jeehanquijano.com/uploads/1/3/2/6/132695397/010c3462a5.pdfIn PDF document text
    • http://files.dpnutritionandfitness.com/uploads/1/3/0/8/130873877/36f40362c984cd.pdfIn PDF document text
    • http://files.acctngmatters.com/uploads/1/3/1/8/131856627/5f5a8.pdfIn PDF document text
    • http://dasot.imagebunny.com/uploads/1/3/0/7/130738970/tanarojifiwovo_fudedu.pdfIn PDF document text
    • http://urluss.com/10tlpyIn 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/1/0433/2807/7992/files/58350701450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5313/8588/files/fupewixugus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6658/1407/files/fishing_report_orange_beach_alabama.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1939/4462/files/rakitadopup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8167/8494/files/68617274947.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8852/7006/files/twilight_eclipse_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vatamukizulenekop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3901/5580/files/gatabebabepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9371/2286/files/vepawivozimudatowazos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0088/9507/files/pifata.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 5

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_off000060c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60C7 5288 bytes
SHA-256: ba9bdde8e1ba7a3dc52fb18b6c4556984ce4566fcb00b76c9bfcb553a48974de
font_01_sfnt_off000072a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72A7 10008 bytes
SHA-256: 31fff6288012b14541aed832e5971a7583234835f835ba319a9fb377a21b63c0

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