Malicious PDF — malware analysis report

Static analysis result for SHA-256 83f8411e8d12098e…

MALICIOUS

PDF

41.5 KB Created: 2020-08-18 22:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 36d9dfa77febf5c28950ff07fdc480b6 SHA-1: 121946809b82959beaaa83ae7ce096fa3cfb9cbb SHA-256: 83f8411e8d12098ea40a66064c5fbe92ffbfcd8bff2cb90b5f8f2670174e2482
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including one pointing to a known malicious redirector. The document body and heuristics indicate a lure for free downloads, likely leading to phishing or malware. The presence of embedded URLs and the redirector link suggest an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=digital+marketing+agency+website+templates In PDF document text
    • http://files.relaxmassagetherapyclinic.com/uploads/1/3/1/3/131378821/251248.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/1/0440/2266/1278/files/parade._com_numbrix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9392/3742/files/inorganic_chemistry_miessler_5th_edition_solution.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6011/7160/files/lotaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/world_mental_health_day_2020_theme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4703/3752/files/75650048346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0737/6534/files/xinimoxapomegeji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/biology_ebooks_free_download_in_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7344/4771/files/smooth_4_app_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1974/8006/files/taxonomic_classification_of_plants.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0781/9422/files/bofalebafixokinolid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7264/3491/files/android_studio_gitignore_file.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_off0000636e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x636E 5652 bytes
SHA-256: ac7af53e20887adc1905bab33f6362a0b30d81703666cbd001c381873610d708
font_01_sfnt_off000076a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 10188 bytes
SHA-256: ed64b8fd4a4aaf1137d4f201b8715922df827ab15165720795416b0e6f48ace1

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