Malicious PDF — malware analysis report

Static analysis result for SHA-256 79c6c3dbdb29f0e4…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 08:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8cebc06fb8ee8e03d3e6f09b343bec65 SHA-1: 5507c64e07423eb2bb701001d416ad3a3e09ce6b SHA-256: 79c6c3dbdb29f0e42d76dc6b12ccff8f9e7ba171b2fd738e09b35a136ec57b24
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service that is known to host malicious content. The document body, though heavily obfuscated, contains a URL that leads to a malicious redirector and several other URLs that appear to be part of a link farm. This suggests the document is designed to drive traffic to malicious sites, 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=busybody+crossword+puzzle+answer In PDF document text
    • http://files.doodadsandtulle.com/uploads/1/3/2/6/132695478/bakujerup_revogogenamo.pdfIn PDF document text
    • http://files.kleinandpartners.com/uploads/1/3/2/8/132815806/fumenabek_nesiki.pdfIn PDF document text
    • http://files.thicketblog.com/uploads/1/3/0/9/130969572/9797647.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/1/0434/1504/4245/files/pozujamor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/absorbent_mind_maria_montessori.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6763/6902/files/paulo_coelho_aleph_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6607/2994/files/sewuvenonekekoxemawidumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8258/7039/files/best_sellers_novels_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5761/8850/files/75421946382.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4157/9420/files/18527207098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5463/6949/files/stored_procedure_in_mysql_tutorial_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6702/2239/files/lotap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2915/8295/files/linusopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2232/6696/files/44802699885.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 1

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_off0000665b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x665B 5500 bytes
SHA-256: 4542d4bf02737e52ad6b21fff46629a326478d3635bd1f2052741c19ae05438d
font_01_sfnt_off0000792c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x792C 10204 bytes
SHA-256: 38010dd1679e3c065b1f4996169a87fa228596e60d12c286d1ed87ae0dd9a3ab

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