Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0bdd0328647d226…

MALICIOUS

PDF

35.4 KB Created: 2020-08-12 04:09:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ec23d0c3b80e5064c0aa8dec8782478 SHA-1: ca458a01d6c6399be4cc12d9f7ed365489371d7b SHA-256: f0bdd0328647d22657236b1be99a1be474f2ecca3e37765a0bf9eaab677f7592
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a mass of external links, masquerading as a "positive economics textbook pdf", with the primary link pointing to a known malicious redirector. The document body itself contains obfuscated text and the malicious URL, suggesting it is designed to trick users into clicking through to a potentially harmful site. No scripts were extracted, but the PDF structure and link farm indicate a social engineering attempt to drive traffic to malicious infrastructure.

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=positive%20economics%20textbook%20pdf In PDF document text
    • http://files.nutmeg-labradoodles.com/uploads/1/3/1/6/131636941/sisipoj_xemami.pdfIn PDF document text
    • http://files.thinkerslodgehistories.com/uploads/1/3/0/7/130738566/wobijibajefun_dotor_tonirufojutejiz_daxik.pdfIn PDF document text
    • http://files.theloosethreadsquilters.org/uploads/1/3/1/4/131452997/sumikul.pdfIn PDF document text
    • http://kejedubug.stoddardcountyhistory.com/uploads/1/3/1/6/131606407/budolefobagunige.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/1/0430/5272/8474/files/us_2015_holidays.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6807/1836/files/rekulam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/87277754858.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0732/6882/files/84868349271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/econometrics_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3991/5175/files/nogemonox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8694/6206/files/sugawerokog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/speed_test_grandecom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4836/0343/files/rsvce_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1596/8667/files/ms_word_to_converter_free_download_full_version_filehippo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4732/0728/files/nufika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/mevadijuxirefasu.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_off00004bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BD6 5296 bytes
SHA-256: 5d4a88935de96edd7224ba463116e87e20572b1622670216d2bdc18df0be4208
font_01_sfnt_off00005dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DD8 10240 bytes
SHA-256: ca22574840d95aa89d3fe3b8c17c762c927d7e4b3854867e573a55e09c88ec68

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