Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4151e5e76e504ff…

MALICIOUS

PDF

42.4 KB Created: 2020-08-24 12:43:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1f75c033c4a1d5de31d6c1cbc88b6be1 SHA-1: 7dbc4999ae5d2909649c6f5f51c12a522b0bd780 SHA-256: f4151e5e76e504ff10e12509322bc13f89940201084ace757b7ea717750b749a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a malicious redirector link and a link farm, indicating a phishing or redirection attack. The document body, though heavily obfuscated, contains the primary malicious URL. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL is https://ttraff.com/pify?keyword=prive+nummers+blokkeren+android, which appears to be part of a redirection chain leading to other PDF documents.

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=prive+nummers+blokkeren+android In PDF document text
    • http://fawovosi.ourwildthings.co.uk/uploads/1/3/0/7/130776485/masesevasupunus.pdfIn PDF document text
    • http://givowo.suprimos.club/uploads/1/3/1/6/131607919/tesafobufepa.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/1/0440/5886/9910/files/how_to_rotate_screen_on_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/application_of_functions_in_real_life.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6377/9221/files/41941228256.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5108/0085/files/44157040673.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8462/8633/files/wolewigawopajivobova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2866/5752/files/willingness_letter_to_join_job.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/92576897820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/4648/1570/files/objective_c_url_parameters_dictionary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/63945230748.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
🗂 Part of campaign: ourwildthings.co.uk 3 samples

Related samples 2

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_off0000686f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x686F 5236 bytes
SHA-256: 4fa40e98c5e62d57fdf0a3e39ef3b0d4db1d470b3c24adb700dcc06246025419
font_01_sfnt_off00007a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A19 10316 bytes
SHA-256: 97f83808479d05993063b7cff239076fea618d47fca5445654fa5e932172fa02

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