Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa521d1cb8edbf6…

MALICIOUS

PDF

39.3 KB Created: 2020-08-20 11:05:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dd8e6bbfa4f02df93e886211a367342b SHA-1: 37c6fdf9788a5c35a9035d4cc5fabfd1831d6358 SHA-256: 5fa521d1cb8edbf643752753ac9c9a2315460ed528f7f4b1be8c641259d7902b
194 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector, disguised as a recipe guide. The ML classifier strongly indicated maliciousness, and the presence of multiple SEO-optimized PDF links suggests a link farm designed to distribute malicious content or phish users. The document body itself contains the malicious URL, indicating an attempt to directly lure the user.

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=bbc+good+food+guide+strawberry+cheesecake In PDF document text
    • http://files.rescuetheunderdog.com/uploads/1/3/0/9/130969503/0bf4b172772989d.pdfIn PDF document text
    • http://files.littlechiefsprimaryschool.com/uploads/1/3/0/8/130874055/9041001.pdfIn PDF document text
    • http://files.blainevdg.com/uploads/1/3/2/7/132740665/fulajusomatamaxopiwe.pdfIn PDF document text
    • http://gibikadax.izasfaceups.com/uploads/1/3/0/8/130814328/2954735.pdfIn PDF document text
    • http://files.lslwinery.com/uploads/1/3/1/4/131407089/ebe11b7a.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/1/0434/7507/5225/files/blouse_cutting_method_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0832/7829/files/ceda_business_plan_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2947/9072/files/classes_of_antiarrhythmic_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/98867803028.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/kenutolulepinawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3456/5025/files/counselling_skills_for_health_professionals_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/wivogirawujisajuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4136/4890/files/61272272867.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/80884551140.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_off00005b40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B40 5700 bytes
SHA-256: 664f046c4ba95e4810c40a59df2fd6b9abf8118f3a980ca781c5f65003778250
font_01_sfnt_off00006eac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 9832 bytes
SHA-256: e70484019fc65175414bb0fd2a9fe2f3a9143899e9ae1ced7bf5718f9ca48b93

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