Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad88842f6fba8415…

MALICIOUS

PDF

40.3 KB Created: 2020-08-10 06:56:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 064a7144dc19f2d5aad92933e577e61e SHA-1: 63b95e9ad9084be7c5bb9264a5be882fa418f888 SHA-256: ad88842f6fba8415d8020f7d5fa314ed66584aaa91ad08bb5a5232781a07ac1c
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating an attempt to lure users to malicious content. The presence of a 'download button' lure and the ML classifier's high confidence score further support this assessment. The redirector URL is the primary IOC, likely leading to a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=acrobat+reader+merge+pdf In PDF document text
    • http://files.tereayersmusic.net/uploads/1/3/1/4/131407423/92c0a5caf8f.pdfIn PDF document text
    • http://files.bornfat.org/uploads/1/3/0/7/130776641/jivarilax_dufisitepisuw_butujokabomosu.pdfIn PDF document text
    • http://files.dena-robertson.com/uploads/1/3/0/8/130874296/sejiverodopiju_fuxivaleri_gugizef.pdfIn PDF document text
    • http://files.emilyjordansmith.com/uploads/1/3/1/3/131381976/8709730.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/1/0433/9544/8997/files/88210734289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6483/6764/files/ropogipozije.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6200/9755/files/kumamunukikafobotesu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3688/4642/files/65763045143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4704/2715/files/78049263237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9775/1709/files/aptransco_syllabus_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9599/9129/files/abstraction_in_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5824/9380/files/bivipolanotelavawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3579/4327/files/nepemimukagod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0138/8953/files/36677926858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/89095952123.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_off00005ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA9 5392 bytes
SHA-256: a2db08e4c29ae8069db77f9bfe111dfd8e8f0b4a839fa25af9a19f0571909ae9
font_01_sfnt_off000070ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70ED 10304 bytes
SHA-256: a44de0a50356e6b9afeba4b12fbaa8e8bca1c37b70b385335bca045cb4924b2f

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