Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd33f7f726f4e60…

MALICIOUS

PDF

40.9 KB Created: 2020-08-04 10:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 82abc6abf29b50eb52a478b3f02dc8f9 SHA-1: 84efb17d72da0913a480aeaebf425ca2aa38a172 SHA-256: dcd33f7f726f4e60ef29e43ec18cd8b560cf8fb1cfd1e4e8fb275120af6d210d
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with the primary heuristic identifying a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector identified by heuristics. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing operations.

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=isometric+view+exercises+pdf In PDF document text
    • http://famifivev.dad2atria.com/uploads/1/3/0/7/130738943/sutilasunuba-pulewa-derinozor-sanimafiledivi.pdfIn PDF document text
    • http://files.edhgs.com/uploads/1/3/1/4/131408529/lujaremokike_nezuki_derunelizaxeti_kelabij.pdfIn PDF document text
    • http://files.cikrefurbished.com/uploads/1/3/0/9/130969987/2256908.pdfIn PDF document text
    • http://files.cherrycitycloggers.com/uploads/1/3/0/7/130775753/2578104.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/1/0432/5844/5979/files/vefaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5352/1823/files/fisola.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1110/files/wemevatexixiwamu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wizivudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9769/9992/files/tefef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/83590010261.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0372/3428/files/mogopatoxek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9322/1783/files/39057185038.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0645/0074/files/95438644875.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/tuzefan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/fallout_4_workshop_framework.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/boxasipododazewizukata.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_off0000623c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x623C 5216 bytes
SHA-256: 0b7eb4ec46d92869293e1313a02fb803d8e9f03a103fc9748110b7aeff9264da
font_01_sfnt_off000073ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73FF 10136 bytes
SHA-256: 828b01e56f396fd3342816568f8e19801775eb02089763eccf4e5aca44771b2a

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