Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37fde41c5f2ff46…

MALICIOUS

PDF

46.3 KB Created: 2020-08-15 14:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dcf95a206a3a965592ead46e058bb0ca SHA-1: a73a7d34939f634b637a6e9fb3ba10a13dbc8e3e SHA-256: b37fde41c5f2ff46c84cebf1842115b8f1eafafcfccfd03df1adb346087db7d4
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes keywords related to technical manuals, suggesting a lure to disguise the malicious intent. The presence of a link farm and a high ML classifier score further support its malicious nature. The primary attack vector appears to be directing users to malicious infrastructure via 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/wb?keyword=yaskawa%20varispeed%20g7%20drive%20manual In PDF document text
    • http://taxetoloj.hidalgobraccoitalianos.com/uploads/1/3/2/8/132814930/a3f49b2d0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0448/8983/3639/files/wixefemut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3337/0522/files/el_gran_libro_del_aura.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1764/9819/files/powomefi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/alternative_tourism_definition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6640/9638/files/black_desert_sorc_build.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0219/files/poe_flask_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0960/5791/files/ospf_configuration_commands_step_by_step.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1659/3312/files/define_economic_empowerment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1791/9909/files/tiberefizegenitokevinu.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 5228 bytes
SHA-256: 187a41323e01e32ed3d2584b88d51428c9bb999135235f7a8455966f7ead4055
font_01_sfnt_off000071e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E4 14580 bytes
SHA-256: bee5526ef7faeee9888a3044b739b2ce627d7dce357b7303806083e9d5ca54a5
font_02_sfnt_off00009e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E96 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

Open this report in the interactive analyzer, or submit your own file for analysis.