Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f610e1d5ab9be70…

MALICIOUS

PDF

42.3 KB Created: 2020-08-20 14:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5f506e246e42aac72dc63cf59ebe55c4 SHA-1: cfe6b6d87a841b0d4c53c2ce62e1aec1b262bc05 SHA-256: 0f610e1d5ab9be705f807b8ec0ecbbf8b47de3a1005f4771e4b4fdd2fdd5315c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many of which point to a redirector service identified as malicious. The document body, though heavily obfuscated, contains text related to educational worksheets and a URL that aligns with the malicious redirector. This suggests the file is part of a link farm or SEO poisoning scheme designed to drive traffic to malicious sites, likely for phishing or malware delivery.

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=fractions+of+numbers+worksheets+year+6 In PDF document text
    • http://files.devereuxazevents.org/uploads/1/3/1/1/131163904/lutonez_vodiro_vefataj.pdfIn PDF document text
    • http://gamamo.lifeofenergyretreats.com/uploads/1/3/1/3/131383965/ed45b6b8309792.pdfIn PDF document text
    • http://files.betruebydesign.com/uploads/1/3/1/4/131453076/4999398.pdfIn PDF document text
    • http://gupuk.cartradio.com/uploads/1/3/0/7/130776436/tofodotapepon_bagago_xerakotetigawok_lezegazekowu.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/1/0433/6641/6534/files/86655949961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4066/0891/files/44593280015.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1266/1152/files/81187972177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8466/1414/files/cateye_bike_computer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9008/1960/files/fejijasewoxavumagizezupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6123/1262/files/core_java_and_advanced_java_syllabus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4363/3822/files/34508878446.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/ultrasound_guided_aspiration_seroma_cpt_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5116/2517/files/90849093237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8150/5695/files/programming_in_ansi_c_balaguruswamy.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_off000065e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65E3 5596 bytes
SHA-256: 8c89e69f41984eaab14b8c4f3c614cac02d022fbdf331da22477d7681af83acc
font_01_sfnt_off000078da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DA 10412 bytes
SHA-256: feafd02217da2069f4907913882de2cf52387c2ec122bfcd2a1e8821b0aea865

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