Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a1891e83b76d83a…

MALICIOUS

PDF

41.2 KB Created: 2020-08-10 19:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2a2f975f1adb8ce4a7a74d84e4b65418 SHA-1: ccb6327156b8cd3ce38853670ce98793b30e621b SHA-256: 0a1891e83b76d83a97b29075fdbf0ef139df687c8d20dcda35a95da124989547
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, suggesting a link farm or phishing lure. The document body explicitly mentions 'Best pdf to word doc converter' and includes a URL that redirects to malicious infrastructure, indicating a social engineering attempt to trick users into clicking malicious links. The ML classifier also strongly flagged this PDF as malicious.

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=best+pdf+to+word+doc+converter In PDF document text
    • http://files.mark-elliott.ca/uploads/1/3/1/8/131856519/zowuf-burox-zezupapezosaf-rogidow.pdfIn PDF document text
    • http://wamutub.benmoorestudio.com/uploads/1/3/1/0/131071157/domeg_wovik.pdfIn PDF document text
    • http://files.laguminalaw.com/uploads/1/3/1/8/131856392/lupali.pdfIn PDF document text
    • http://files.adelaide-pilates.com/uploads/1/3/0/7/130739761/zijupepojumoviziwese.pdfIn PDF document text
    • http://files.aryneffert.com/uploads/1/3/1/6/131606670/senapi-voxopo.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/1/0428/1905/9868/files/learn_english_via_listening_level_3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7822/1973/files/depim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0979/2407/files/fafaridofekawozezivugot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/16525829466.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/9475604539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6019/1637/files/zusikutupopojudosojafugig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1774/6070/files/27165333749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3462/4679/files/xubimedobaropekerijaval.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2313/7957/files/75363600219.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8697/6926/files/37570929786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4724/7263/files/manual_prctico_de_auditora_interna.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xeniwepisovera.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_off000063f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F1 5108 bytes
SHA-256: c98b92992dcb1c1c329387158a94b28ce5d9673f59a7dc534f5774d47d35ffc7
font_01_sfnt_off00007586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7586 10120 bytes
SHA-256: e2ca18c9c0151724f4af2fbbf187f99e6b46c14a278e471d951c00023b596a50

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