Malicious PDF — malware analysis report

Static analysis result for SHA-256 3835c2b6d8c598ec…

MALICIOUS

PDF

41.8 KB Created: 2020-08-20 05:05:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 25d08fade5ed555e8fa0342e944458b3 SHA-1: 07b12d6e50441faa5a7904b8bf179a41e7381ca0 SHA-256: 3835c2b6d8c598ece3f802f6150aae9801c1f4b9d75fb92260fc8f1f34d18d81
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though heavily obfuscated, contains a URL pointing to a redirector service. The primary attack pattern involves luring users through a seemingly benign document to a malicious URL, which then likely leads to further malicious content or phishing attempts.

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=free+printable+blank+board+game+template In PDF document text
    • http://rudabi.socalendurance.net/uploads/1/3/2/7/132712348/c04f0839c6234f1.pdfIn PDF document text
    • http://files.thatspeechlady.co.uk/uploads/1/3/1/4/131454549/8344670.pdfIn PDF document text
    • http://files.mindfulmoto.us/uploads/1/3/0/7/130739387/5964010.pdfIn PDF document text
    • http://files.craigcommercialrealty.com/uploads/1/3/2/6/132682210/57100.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/1/0437/6671/0433/files/dobufonuwuvewin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/advanced_modelling_finance_using_excel_vba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9304/1053/files/bumotomupidamepap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2079/5556/files/social_media_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/agenda_2020_editable.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9763/6512/files/58048276443.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4292/1886/files/50065657664.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6353/3977/files/geluwopebon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/46689027832.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/modern_marketing_concepts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1455/7596/files/apple_iphone_ringtone_free_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9854/6082/files/ridoderuna.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 5

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_off000065f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 5260 bytes
SHA-256: 5b9dee76dc4fb5bec7e9d8786988df51152ab2dcdf267b8064d5ef2ca4e2c3eb
font_01_sfnt_off000077b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77B2 10144 bytes
SHA-256: 16b1e5e71494881ca0514e3f047885ba532162854086e2224743b153adad40e6

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