Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dc4884e961c52e…

MALICIOUS

PDF

55.4 KB Created: 2020-08-27 14:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bfae238975c3d8cc9b8990eec5c00755 SHA-1: e730787c8697fca22665b5b19ac2ada12b8168aa SHA-256: 37dc4884e961c52e646b5d648805b3804cdd536f2b9b614a7823c7a6b2b5bd53
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with at least one pointing to a known malicious redirector (ttraff.cc). The document body, though heavily obfuscated, also contains this malicious URL. This indicates a likely attempt to lure users to malicious sites. The presence of a large number of external PDF links suggests a link farm strategy.

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=the+conversation+hill+harper+review In PDF document text
    • http://pakidasu.kbgaragedoors.com/uploads/1/3/0/7/130775403/jinigenazos.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/1/0431/3533/6616/files/preveno_do_cancer_de_boca.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0221/5069/files/35396397850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7279/7337/files/present_simple_continuous_perfect_tenses_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4464/2716/files/google_sheets_to_google_calendar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9886/0707/files/kadavixozakanizojuzozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2637/5071/files/schoolboy_q_oxymoron_download_zip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8876/5337/files/careercup_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6390/1348/files/formation_catia_v5_gratuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5911/7222/files/kendo_chart_tooltip_template_date_format.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5096/6950/files/3356328010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/novorubafiwani.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9887/3763/files/domestic_animals_colouring_pages.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/nozolinet.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_off00009c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C96 5120 bytes
SHA-256: 5701d560cce2384c26ebceb1bac5d86c45b881fea5cad75213c48f41aaa2d6c3
font_01_sfnt_off0000ae0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE0A 10120 bytes
SHA-256: 00b4fcb6691e45cc2d0aa8a6a5f41b65ff871a0664c4ae90c67ef487ac74c755

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