Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46db4dc28eaa446…

MALICIOUS

PDF

45.0 KB Created: 2020-08-08 07:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cbdcbb65f1f9fd3e20ffe5173ae0d16c SHA-1: 4ff426ce29dda79df809192d7a741dc856b14e73 SHA-256: a46db4dc28eaa446f062680cc175e0f111b55f3c363e07174429bd40d4685890
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous links pointing to external PDFs, many hosted on Shopify. A low-signal heuristic for a download button lure further supports the malicious intent. The primary IOC is the malicious redirector URL, which is designed to lead users to malicious content.

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.
  • SEO-redirector lure link (multi-word utm_term) low PDF_SEO_UTM_REDIRECTOR_LINK
    PDF contains a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the search-keyword gateway used by the 'free document download' phishing family. Surfaced as an IOC; on its own this is a low-confidence signal.
  • 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.cc/wb?keyword=free%20d In PDF document text
    • http://files.johnboback.com/uploads/1/3/0/7/130776041/merefujedun_raxukodunonef_busipojewik_zerolebiriwona.pdfIn PDF document text
    • http://files.smashcakesetc.com/uploads/1/3/1/0/131069899/jatezubokafi-robop.pdfIn PDF document text
    • http://files.bettinakoch.net/uploads/1/3/1/0/131070476/3277690.pdfIn PDF document text
    • http://files.autopartsau.com/uploads/1/3/0/7/130738572/jebexiz_jopepovikuza_xamigiwomiwabup.pdfIn PDF document text
    • https://ttraff.cc/wb?keyword=free%20d'nealian%20handwriting%20worksheets%20printableIn 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/1/0430/4479/8613/files/37526456899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9268/7513/files/mmd_classroom_stage_dl.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6703/8109/files/vugun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1756/0473/files/100_doors_challenge_level_57.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/30426300388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3174/1095/files/gastrointestinal_tract.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/32277069263.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/gunudofiwudugorubimen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8385/7053/files/26275317763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6106/7428/files/36517386482.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5426/0643/files/aspen_plus_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3733/5464/files/79946027230.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/24_hours_a_day_hazelden.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_off00007088.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7088 5508 bytes
SHA-256: eec254011d1dc0041dd4a101a3d0e76c7c82e14081c8c6fc91f666326f3ae876
font_01_sfnt_off00008353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8353 10292 bytes
SHA-256: de1746a7138056cebe2ef3b95e85d61b85574ca73dea319e225143a1c3f32bba

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