Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4a8b745244cfc98…

MALICIOUS

PDF

49.4 KB Created: 2020-08-14 22:00:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5ca906e70ada96e09ae49c34ed8b8023 SHA-1: fa69c179929d6374495f3153604cf0fdaf02b2bf SHA-256: c4a8b745244cfc98193adeea4070f2243221ffb83ef75f434435373dcf2d6a8c
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, many of which are linked to a 'link farm' heuristic, suggesting an attempt at SEO manipulation or content distribution. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.cc/pify. While no scripts were extracted, the sheer volume of links and the presence of a malicious redirector indicate a high likelihood of malicious intent, possibly to lead users to phishing sites or malware downloads.

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.cc/pify?keyword=disney+boardwalk+map+2017+pdf In PDF document text
    • http://jexemukas.piercecountyscd.org/uploads/1/3/0/8/130874493/2637653.pdfIn PDF document text
    • http://vinifixap.stcbasketraffle.com/uploads/1/3/1/3/131380213/ad85f8065fb.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/1/0433/0687/7080/files/ketotojugidumirazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4220/9945/files/bagpipe_music_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/66020110633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/tanatologia_catolica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6617/1287/files/42673890971.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/3809/3990/files/activity_books_for_3_4_year_olds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6807/0815/files/meveg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/34637441969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8211/9323/files/consonant_sounds_and_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/bosch_dishwasher_500_series_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8362/8708/files/grade_11_biology_textbook_mcgraw_hill_ryerson.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2724/2914/files/zibalamuvumoza.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_off00007f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 5992 bytes
SHA-256: f45a5b40f23f32eea45d5a6d514c07b69084b65c901c4d2caab12e8cde159bbb
font_01_sfnt_off00009371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9371 11112 bytes
SHA-256: e9068a5f0eba3dd69fcf7b1f971cfa5c5c242e2667a60e1d0390173fb3f627df

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