Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd9ff8f3be21cdc…

MALICIOUS

PDF

107.2 KB Created: 2020-08-24 11:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ccba0dea16e41f04351b2a82aede92a SHA-1: 5deeb2f377a55bea4f8a3cb49816bf6efec353e4 SHA-256: 4cd9ff8f3be21cdcfeb3fc2584b8f148c71dca0d0d20ace70e8a7677d4b873fd
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates that a link redirects to known malicious infrastructure at 'ttraff.cc'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=arabic+morphology+and+syntax+pdf', suggesting the primary intent is to redirect users to this malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=arabic+morphology+and+syntax+pdf In PDF document text
    • http://files.owenmathclass.com/uploads/1/3/0/7/130776273/tugof-vopowitu-zaxokupotomo.pdfIn PDF document text
    • http://files.rost-collage.com/uploads/1/3/0/8/130813095/3870841.pdfIn PDF document text
    • http://files.visiblesolutionsbychris.com/uploads/1/3/0/7/130776726/2025137.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/1/0430/2936/4889/files/muzobiporurexejixomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/zuvebojatokejazimax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8153/9488/files/new_wave_oven_recipe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5619/3955/files/14467029138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/0808/3356/files/defedufuxawusenopiraz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7506/7297/files/dunellen_school_district_salary_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5143/4659/files/27138220849.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8030/2244/files/wevapenumuxeloji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1021/2519/files/70532759476.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9315/5230/files/14759381046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8369/4247/files/rivagekovezalegujibep.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/207784486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9581/8404/files/zularawivux.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000155ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x155CA 32092 bytes
SHA-256: 3959da67a5d371ee0ce243bbeadea3a43c2d379f38ab322717cca3516645a475
font_00_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 5536 bytes
SHA-256: ceccc6e29652256d12e27d020bcca10454731be885bc3cb61cd566c52d0264e9
font_01_sfnt_off000128dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DD 14520 bytes
SHA-256: f2a85c2ca69fe4543d6633e72f74c6cbc0cc9254ffe24e547fb4075b1183ca52
font_03_sfnt_off000190eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x190EB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378