Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab44dec27e170ba…

MALICIOUS

PDF

113.4 KB Created: 2020-07-31 05:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 817ecb1a385994c0835ca6c6d769c3b0 SHA-1: 78bfe938958caf4d8036aa8ecd59e9af7c69c03d SHA-256: 5ab44dec27e170bae5b091593a2f2c0c066308388a754cab8c821e8d031e4070
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body and heuristics suggest an attempt to manipulate search engine results or lure users to malicious content via a "free download" pretext. No scripts were extracted, but the presence of embedded URLs and the ML classifier's high confidence indicate malicious intent.

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=cia+triad+pdf In PDF document text
    • http://files.lhec.org/uploads/1/3/2/6/132682235/0a40c5a84c7e85.pdfIn PDF document text
    • http://files.kirtansongbook.com/uploads/1/3/2/6/132681295/2914980.pdfIn PDF document text
    • http://files.healthtruth.blog/uploads/1/3/1/4/131407010/3eae2ee.pdfIn PDF document text
    • http://files.sunshinedentaldds.com/uploads/1/3/0/7/130776183/verekejefejilu.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/1/0429/9885/7891/files/tozanisumapojijowusun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5698/8317/files/27714512733.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/wuvupawefafikijozubiwovin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3150/8645/files/wedaminojavejexuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/4862253660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3633/4501/files/sotedeliv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/wepunip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/tidekipasox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/jawukegup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9275/3049/files/74391267233.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0550/1852/files/ketirasolawusarap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45865267400.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0118/4417/files/webot.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 6

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_off000177e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177E1 4304 bytes
SHA-256: 022544f3dd7501a3b21d63da16b4f4867a85f7f9f8aab29dcf7dd483a3d3d2fa
font_01_sfnt_off0001868d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1868D 16116 bytes
SHA-256: 8f05b411737014227eb6fb6e57ee10977d931875d9d318994a3774d8fc3f78ea

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