Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fe538f8f7032591…

MALICIOUS

PDF

45.0 KB Created: 2020-08-15 03:36:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 00a1227d8b466e3709a7e9c7b9402537 SHA-1: fb2b57c25ba4087ef3c7fc740de809b1130e213d SHA-256: 4fe538f8f70325919446c28f3821a9cef47818079c6b1eb65516682e62b154cf
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, disguised as a tutorial. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this behavior. The document body, though heavily obfuscated, contains text related to 'photo editing in photoshop cs6 tutorials pdf' and the malicious URL, reinforcing the lure.

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.com/wb?keyword=photo%20editing%20in%20photoshop%20cs6%20tutorials%20pdf In PDF document text
    • http://files.roundhillat.org/uploads/1/3/2/7/132712011/lezedep.pdfIn PDF document text
    • http://files.butternutbrookequinecenter.com/uploads/1/3/1/6/131606291/2540467.pdfIn PDF document text
    • http://files.nextav.online/uploads/1/3/0/7/130740255/nogowopi.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/1/0427/7328/2983/files/sufawewidepamenemukanum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6130/4727/files/histologa_vegetal_al_microscopio_ptico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/56972838595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4205/4048/files/biochemistry_audio_books_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0344/4380/files/nuvup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4435/1649/files/cutaneous_respiration_in_frog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0944/9884/files/nozazefisapaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7329/6789/files/lunch_catering_menus_template.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9168/0666/files/angels_in_america_script_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9175/3115/files/adjetivos_comparativos_em_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5761/7823/files/51818546588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4329/9232/files/33281405935.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7602/5497/files/soxulidefotavema.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7936/8858/files/21429962004.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B9 5456 bytes
SHA-256: 76f3d3f5b6ddadf6ae398b6b85cc7fecbddc88b25f5a31d216b3d1f8e0391471
font_01_sfnt_off00007834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7834 9500 bytes
SHA-256: 7a5a0ae6b1f420892d2f1caf603345bd52c44267d3b724d972facaed3bc71fa4
font_02_sfnt_off000098af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34