Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd35b56e529ba84c…

MALICIOUS

PDF

41.7 KB Created: 2020-08-12 02:19:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e845e510259b9e593c3d5339b31ddc27 SHA-1: 90057e045a6876073f9042a39461799d31891a74 SHA-256: dd35b56e529ba84c4b6c789dcda0e3ab06bb8273b93ca92992e965f347b18a22
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. The heuristic PDF_SEO_LINK_FARM indicates a link farm, and PDF_MALICIOUS_REDIRECTOR_LINK specifically flags a link to known malicious infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link, suggesting a lure to external malicious content. No scripts were extracted from this sample.

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=astm+soil+testing+standards+pdf In PDF document text
    • http://rumapute.nvokeherbals.com/uploads/1/3/0/7/130776031/mokedofa.pdfIn PDF document text
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdfIn PDF document text
    • http://tufedem.sytchain.com/uploads/1/3/1/4/131452883/xuzopololun.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/1/0431/5545/6149/files/bukoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8175/0941/files/16942903082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/pdf_stream_to_base64_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3395/9327/files/auditoria_financeira_teoria_prtica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/5th_grade_math_end_of_year_test.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9443/2161/files/vezirisodenurapik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/85787606820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6758/0322/files/roxetoliguvaji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1853/4557/files/about_gst_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9608/8481/files/prelude_bwv_846.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_off000065ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65AE 5348 bytes
SHA-256: ae2ee8a467090726b26d6ba3718a55572932b46074b69f5d573afa403877db55
font_01_sfnt_off000077c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77C1 10168 bytes
SHA-256: b36f3e7bef60452f483fce945fdcdf35be5129c182e1f357efbbca38b7d00597

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