Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96cb0cf8197d285…

MALICIOUS

PDF

43.2 KB Created: 2020-08-16 20:51:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 865b67c19796a22e594abb727a7f2be3 SHA-1: 0ecfbbee4c543263bc3a384fd57ecbc92cfac1ae SHA-256: c96cb0cf8197d2852a0e78155c7dd23690e37a8a3572f71bdccb336976cb7901
202 Risk Score

Malware Insights

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

The PDF document contains a prominent link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure for downloading potentially unwanted software or malware, masquerading as a WhatsApp update. The PDF_SEO_LINK_FARM heuristic further indicates a large number of outbound links, many hosted on Shopify, likely part of a link farm to improve search engine ranking for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=descargar+whatsapp+web+apk+2018 In PDF document text
    • http://files.patriciabjorklund.com/uploads/1/3/0/8/130813447/5633887.pdfIn PDF document text
    • http://piwipo.crystalspiritdesigns.com/uploads/1/3/0/7/130775607/ce0537b2fbbb376.pdfIn PDF document text
    • http://gemedo.erickacollado.com/uploads/1/3/2/3/132303072/xunuzulajuti-logupawepali-ruridasuvojezat-gufakupodepek.pdfIn PDF document text
    • http://files.ewapointe.com/uploads/1/3/1/4/131406510/dimaridij.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/1/0429/8843/7655/files/xudewupipetalulenupo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9346/4990/files/56759993761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5528/4373/files/96230505528.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5594/6655/files/41635547463.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1663/4016/files/pedotogunufezene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57790570823.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8339/9321/files/67603191987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/print_an_int_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3182/1468/files/dependencies_in_project_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6966/1589/files/bluestacks_for_window_xp.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 4

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_off00006622.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6622 5980 bytes
SHA-256: 8f2c64b0ca4d816e3c8c2c489cc2dca5974fe2322314b7fc15ca1988cedc55fd
font_01_sfnt_off00007a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A8D 11356 bytes
SHA-256: ea3d860f0782bbb70b6bde50a346965f63779a82b0ec947307c6cefdeb10c041

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