Malicious PDF — malware analysis report

Static analysis result for SHA-256 7978c2e463468d9c…

MALICIOUS

PDF

40.2 KB Created: 2020-07-24 21:05:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7f0e4170383b67ec65b54a0e02120624 SHA-1: 6cc1adb6c8af0d19b6ee2f4524b53822f6ba481e SHA-256: 7978c2e463468d9c2f051bf6ebeab0c515dfe952f0734ebb8d2614b8661b7772
234 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are identified as malicious redirectors or part of an SEO link farm designed to obscure the true destination. The document body, though heavily obfuscated, contains text related to 'fishing reports' and 'blue mountain lake', suggesting a lure. The presence of multiple PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics indicates a strong intent to redirect 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.com/pify?keyword=blue+mountain+lake+ar+fishing+reports In PDF document text
    • http://files.transportchicago.org/uploads/1/3/2/6/132681456/d7cd05370.pdfIn PDF document text
    • http://files.corpuschristicatholicacademytrust.org/uploads/1/3/1/3/131378968/nuririnaz_tenon_pafamumarowixug_lomasima.pdfIn PDF document text
    • http://files.nightherontexas.org/uploads/1/3/1/3/131384679/rikipifemarebewi.pdfIn PDF document text
    • http://files.teenstutorteens.com/uploads/1/3/1/4/131453194/gefalolajo_zifejapifem_femijof_texoxapa.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/1/0436/3547/4590/files/bazuzerakut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/dukavuwavewota.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/nomujesajosubuwerurag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/75130531250.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2590/8383/files/21804991164.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3786/files/jenamumun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7423/9129/files/disuratowe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1128/4885/files/73624895594.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7505/2454/files/fisirefenulokejatitemetak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6861/1989/files/34509098177.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vaxopegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5245/7369/files/85467846541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6742/4416/files/92091131761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0873/6927/files/dagava.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6038 5308 bytes
SHA-256: 57facc43b2fda4742b25856da3595cd2f85c2920c64acca509eaf72f39be529c
font_01_sfnt_off0000721c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x721C 9728 bytes
SHA-256: 9506d7def18538337c243100423397cf8b86c57137919cb6ccc753df8e5e268d