Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf55ebca4b3371b1…

MALICIOUS

PDF

65.0 KB Created: 2020-08-14 22:18:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 675d67942b047e238116555f74193198 SHA-1: ccd0e5c56aba14b317e340e44f8f15f6f489afb0 SHA-256: cf55ebca4b3371b17a66da18b201c234df6c8de6163559fe5bd39a3921793b64
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 links, identified as a PDF link farm. One of these links, 'https://ttraff.cc/pify?keyword=gruen+transfer+abc+tv+guide', is flagged as a known malicious redirector. This suggests the document's primary purpose is to lure users to malicious sites, likely for phishing or to download further malware.

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=gruen+transfer+abc+tv+guide In PDF document text
    • http://files.welloiledmamadesigns.com/uploads/1/3/1/1/131163635/jolozasaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5799/4138/files/92520720988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/zajokezeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8504/2598/files/air_force_exam_paper_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4259/3189/files/42876936364.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/4531/8819/files/definicion_de_ansiedad_segun_autores.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/systematic_theology_by_john_frame.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/bureripugepekapikovorej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/sidiboxer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/60493047013.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6955/3305/files/muhammad_al_ghazali_books.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 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA739 5160 bytes
SHA-256: 4406d60f45d805c7a0b31c9db72ecb92c4b9a6b2496e4a521171650872a10d52
font_01_sfnt_off0000b8d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8D8 15456 bytes
SHA-256: 4fb6c9e033dcdcfb70ddb4178e082ed5d72563d0e1fbf6f4059ca0b8d942b889
font_02_sfnt_off0000e8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BF 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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