Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecff0c63cd0f25c…

MALICIOUS

PDF

43.6 KB Created: 2020-08-19 06:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 68946a591dc1b635eb12943c18f68de4 SHA-1: 7712497395ab14451643122467a6bc8a4829d360 SHA-256: 3ecff0c63cd0f25c63faa37716b671e486316d15621336bce099bbbdacc9f0ca
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to suspicious or unknown domains, indicating a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains keywords like 'whatsapp status sad video full hd' which appear to be used as lures to disguise the malicious intent of directing users to potentially harmful websites.

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=whatsapp+status+sad+video++full+hd In PDF document text
    • http://files.veteransmusicfest.com/uploads/1/3/1/4/131438823/vuwitirezikan.pdfIn PDF document text
    • http://kunit.atmyfarm.com/uploads/1/3/1/6/131636648/maxilumevujabedut.pdfIn PDF document text
    • http://files.bulkbathandbodyproducts.com/uploads/1/3/1/4/131437223/1530165.pdfIn PDF document text
    • http://zapomi.travelerstateofmind.com/uploads/1/3/0/7/130739732/mosal.pdfIn PDF document text
    • http://files.meltinyourmouthcupcakes.com/uploads/1/3/1/3/131379396/926221886.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/1/0439/9579/1518/files/how_to_make_tts_go_fast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/delhi_university_south_campus_marksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/46844755747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7333/8533/files/top_answers_in_an_interview.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1478/1088/files/divorce_application_form_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8579/8301/files/94179974089.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/67102644450.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/4581/7253/files/materiales_dentales_conocimientos_basicos_aplicados_gratis.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x46E0 5108 bytes
SHA-256: fce573fbaeb1bef21a2670d119b03fd9f046f827519f8f63951b45a32f574e2d
font_01_sfnt_off0000584b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x584B 3484 bytes
SHA-256: 8fd6fb7a7907dcd6a4fd1dc02cfadded5a3de21a5d8e0d98ca88928441dcd4cb
font_02_sfnt_off00006664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6664 10340 bytes
SHA-256: 5677032b2376dc78a642d2981f399fc7ca39f435ecf5a3d2082dea3a82dfa0bc
font_03_sfnt_off000089cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89CC 16928 bytes
SHA-256: 620348a74bca1c1588a03aea768e1914a6654c89b08fb0c534c7d4dec2822fc9