Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ff9905d0af9cb4d…

MALICIOUS

PDF

50.7 KB Created: 2020-08-12 09:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3dd110e6f991b896a6f14a98baff6056 SHA-1: 039e6c583c775cdec659931182622039cd73573d SHA-256: 3ff9905d0af9cb4d3720468b58c318739ff8bf9337c51027526d8db3fcb87e5a
214 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to seemingly benign Shopify domains, but one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'accounting principles 11th edition solutions pdf' and the malicious redirector URL, suggesting a lure to a phishing or malware distribution site. The presence of a callback phishing lure heuristic further supports the social engineering aspect of this document.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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.com/pify?keyword=accounting+principles+11th+edition+solutions+pdf In PDF document text
    • http://files.congrevelab.org/uploads/1/3/0/7/130739835/1534088.pdfIn PDF document text
    • http://files.permanentmakeupsociety.com/uploads/1/3/2/8/132814791/zilojid.pdfIn PDF document text
    • http://fovup.winchesterdisciples.org/uploads/1/3/0/9/130969060/mozowanap.pdfIn PDF document text
    • http://files.moirajo.com/uploads/1/3/2/7/132710655/6052939.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/1/0431/0938/4343/files/55777910214.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3621/1357/files/1467405311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/cambridge_global_english_starters.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9910/2115/files/89697954685.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2439/2093/files/74394481555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0451/3647/8361/files/class_11_ncert_biology_book_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6734/1974/files/90998936598.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1761/7057/files/bagivadujofej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0329/7438/files/gubuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8560/2721/files/mufutexovetabisepus.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 8

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_off000085ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85EE 5248 bytes
SHA-256: f32453cc287521ab9f3fbf3581991d0acdc956e160f8719568839c3705652b47
font_01_sfnt_off000097ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97CA 11464 bytes
SHA-256: a1989626c758301cc39dc8ec1dfbc16491407dc0a86b702e60ccc9083ab74f57

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