Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aa97ff1ffe713c6…

MALICIOUS

PDF

41.8 KB Created: 2020-08-12 18:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1438666da176936e2e62fe5eaf4da19 SHA-1: 0dd6dab898fa59b86d744d935f01bc59b10ac69c SHA-256: 1aa97ff1ffe713c6412479e209e671c46c9b21d1fabbf27fd4ce07a4e2eee5e1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a link farm or SEO poisoning attempt. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern involves luring users to malicious infrastructure via these embedded links.

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=anglo+dutch+treaty+1824+pdf In PDF document text
    • http://teseg.olphlindenhurst.com/uploads/1/3/1/8/131856161/judunoveta.pdfIn PDF document text
    • http://files.parkhillbowlingclub.com/uploads/1/3/2/8/132815154/4047543.pdfIn PDF document text
    • http://files.clarerodandgunclub.com/uploads/1/3/1/6/131607522/8a48b35.pdfIn PDF document text
    • http://files.tygartmountainsports.com/uploads/1/3/1/8/131856516/bulenaj-gakiduna-xalazanew-defoka.pdfIn PDF document text
    • http://files.baragisladottir.com/uploads/1/3/2/6/132681826/futukirafol.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/1/0429/5104/9370/files/98099471822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/coaching_style_of_leadership.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/kekeguso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3134/7868/files/simij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/28650507632.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9879/1329/files/92849979310.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/8325/5198/files/bionator_ortodoncia.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7921/2959/files/middle_between_two_dates.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wexidemunuviviradepinitim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0510/0711/files/20524385140.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2977/3982/files/merexoromumazenuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7529/6670/files/wokegelufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/bopunavelovupo.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_off000064a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64A6 5796 bytes
SHA-256: 89b7a1ed7d8132853fb86eef8380962f9cbd4066040b662fa001c9324d4db89c
font_01_sfnt_off0000786c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x786C 9964 bytes
SHA-256: dd7014ee5427ff4d6acbae586379b30f91e63e9fdc970601f7b50b2e4d4c0d43

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