Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b82fc65caba9e1…

MALICIOUS

PDF

101.0 KB Created: 2020-08-08 01:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d82f7f9f1e5a716e8f859404dd828fa0 SHA-1: 3122c46cd5634c6b786de11815889489b3e58b67 SHA-256: 62b82fc65caba9e1ac8865ddfa57b3327230b0d962d047e0dedf809dfa48c52e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the one identified by the heuristics. This suggests the primary purpose is to redirect users to malicious infrastructure, likely for phishing or malware distribution.

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=ciencias+naturales+5+primaria+santillana+saber+hacer+pdf In PDF document text
    • http://files.rileyringlets.com/uploads/1/3/1/3/131379948/kakof_tudalipew.pdfIn PDF document text
    • http://files.vcaec.org/uploads/1/3/1/3/131380480/zovemuxarorovogiworu.pdfIn PDF document text
    • http://fuzuf.lorrainechandler.com/uploads/1/3/1/0/131070450/6592731.pdfIn PDF document text
    • http://files.lakecitysecondary.com/uploads/1/3/1/4/131453657/6c0e3e66.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/1/0431/6086/2874/files/jorukukajowalu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9884/7894/files/51512168483.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/0574/1989/files/makkar_writing_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7518/2485/files/tuxifu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5915/1009/files/17717649949.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9663/6580/files/atm_card_request_letter_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/54341666742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1916/6119/files/nuzogegixitakelof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6623/7852/files/bagudonadikezexerilazukot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4959/8632/files/setenuvanakadavufiti.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_off00014c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C92 5564 bytes
SHA-256: d78a7348ad1a90d4836b6f77373a03129c76e6aa32b943351d916df961d021a2
font_01_sfnt_off00015f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F49 11696 bytes
SHA-256: 1e447682802c7962c2ac869ef7b023729cb0cffe5444f137c15d8ac62e635c78

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