Malicious PDF — malware analysis report

Static analysis result for SHA-256 8458c6077cefebf2…

MALICIOUS

PDF

39.6 KB Created: 2020-08-26 01:18:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7aa91a92947ee1f057632a1a4c34b480 SHA-1: f6c65ba51c3aff50a254644e5362c2243f08520d SHA-256: 8458c6077cefebf214e0798c2532a96fe667fdfea5ad4da62b9a7bfa4bbbcf14
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, with a critical heuristic identifying a link to a known malicious redirector. The document body, though heavily obfuscated, contains the same redirector URL and references to other PDF files, suggesting a link farm or redirection scheme. The ML classifier also strongly indicated maliciousness.

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/pify?keyword=manual+test+de+la+figura+humana+goodenough In PDF document text
    • http://files.airconditioningcambridge.co.uk/uploads/1/3/0/7/130775286/napuwuzoduzu.pdfIn PDF document text
    • http://files.rhsmorningshow.org/uploads/1/3/0/7/130739945/bunabejulem-pazepogo.pdfIn PDF document text
    • http://sosozel.lakehousebv.com/uploads/1/3/1/4/131438759/f95370b9fd2.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/1/0432/2073/0011/files/loxuduludu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5780/6502/files/vesafotamoxixujovebami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2095/1445/files/28176076492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3747/4472/files/25308616887.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9880/7202/files/pdf_homero_odisea.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1321/6168/files/tidugelatezosigubab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9028/8541/files/brazing_copper_sheet_metal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9158/2357/files/html_tags_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0081/2952/files/8294851524.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/nuralasipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8098/1407/files/idioma_kaqchikel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6903/6958/files/vesonizo.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 6

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_off00005e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 5324 bytes
SHA-256: 2d717eb954677411558151061beac14b60f24c09589162d1f9fa9990612e6c92
font_01_sfnt_off0000702b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702B 9756 bytes
SHA-256: bfb55e8d5391ad430b347b495ff2d9c260a8be892b567b8851bedbbd65303268

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