Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb5450da68dc4dc…

MALICIOUS

PDF

34.1 KB Created: 2020-08-06 10:17:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c4fa2a7f2879ae111dc435908d96c811 SHA-1: f269dcd04ea952d1418f0e29f71c01b34d17d0e7 SHA-256: dcb5450da68dc4dcc59f51e02e1ad1678a389a1099390f9f68dac5d23e6462bf
202 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The heuristic findings indicate a PDF link to known malicious redirector infrastructure and a PDF link farm, suggesting an attempt to drive traffic to malicious sites. The presence of a 'download button' lure further supports a malicious intent to trick users into clicking on these links.

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.cc/pify?keyword=arifureta+light+novel+pdf+free+download In PDF document text
    • http://files.joel-nichols.com/uploads/1/3/2/7/132712120/1372492.pdfIn PDF document text
    • http://files.gazzbaby.com/uploads/1/3/1/6/131637150/1521935.pdfIn PDF document text
    • http://files.lisalmiller.com/uploads/1/3/2/7/132710711/gunedobiwuzedewuxe.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/1/0433/9492/4700/files/kojotarilewojexilozulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8237/4561/files/77538967307.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6201/8716/files/88716448057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5440/7578/files/christmas_organ_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0954/0257/files/50506597162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3683/5993/files/bruchrechnung_erklrung.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1808/3742/files/kividamomegokurovazuro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/nokenutazirodufebulezul.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2778/4099/files/50518686801.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2652/0987/files/sesuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8624/2201/files/wexelagazeboxu.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_off0000476f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x476F 5268 bytes
SHA-256: b24c707d5dce68fae4c6ee7a2a4d8463b2a8165247385da90ac266064a2b21eb
font_01_sfnt_off00005967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5967 10160 bytes
SHA-256: bed35cbd8be9aa0b50f5e46f2faf5ce851eca72b2b2583c67b5e67afeb81a44e

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