Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ffb5311cf32c4c…

MALICIOUS

PDF

50.6 KB Created: 2020-08-12 10:12:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a40b07f5106a0fd63d1acef1e7b84273 SHA-1: 5bfb64c11bc3f85bf045bf206ee3dbc0dcc8d8de SHA-256: c9ffb5311cf32c4c7b03028928ab03892292b9157624b90ab9d9b3e44ef8865f
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.ru/wb?keyword=download%20novel%20challenger%20deep%20pdf'. Additionally, it features a PDF link farm with multiple Shopify URLs, one of which is 'https://cdn.shopify.com/s/files/1/0431/7275/7668/files/fusik.pdf'. The presence of a visual download button lure further supports the malicious intent of redirecting users to potentially harmful 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.ru/wb?keyword=download%20novel%20challenger%20deep%20pdf In PDF document text
    • http://files.dkgalphaalpha.org/uploads/1/3/2/6/132696558/8595452.pdfIn PDF document text
    • http://funaxu.cmiltonwrightmusic.com/uploads/1/3/1/3/131384401/7432755.pdfIn PDF document text
    • http://fopena.amaartisanjewellery.co.uk/uploads/1/3/1/4/131453555/wezanadixanosax.pdfIn PDF document text
    • http://vitus.drivelearning.org/uploads/1/3/0/9/130969103/tobuvuvorifa.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/1/0431/7275/7668/files/fusik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6795/7658/files/92412941537.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8343/2096/files/timufifarata.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6482/7805/files/11714325366.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7880/9755/files/blood_relation_questions_for_ibps_po.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/89806060988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rerivavegexem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2590/7368/files/astm_impact_test_standard.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1384/0793/files/55027898344.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7457/9608/files/architectural_drawing_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/goreruromilorijij.pdfIn PDF document text
    • http://tinyurl.com/govtq67In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72F5 5388 bytes
SHA-256: b9a139b638f46fa08e584fbcff60129f6a79fc4837418219e94d34158da7007d
font_01_sfnt_off00008560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8560 9976 bytes
SHA-256: 5a5aff1b5baf5edbdda9038549a01ddab52a6a86603f1a32e653e50d11c3f620
font_02_sfnt_off0000a7b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7B0 16248 bytes
SHA-256: fbeccb1482ee56052ed809ec6cb7dfbc577d51b9212e43fffabc93e29761b6bf