Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca75953192cb5e2e…

MALICIOUS

PDF

44.9 KB Created: 2020-07-30 22:23:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5256dff89913487c1b310614ff09a1ea SHA-1: e177e108d565d0c73c24d2472a0c240ca2e01f17 SHA-256: ca75953192cb5e2e49988e4aa8b95f168244b9f97a88b46ee439f096709162d7
194 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 document body, though heavily obfuscated, appears to reference 'Attention deficit hyperactivity disorder 2020 pdf', suggesting a lure to disguise the malicious links. The presence of a link farm further indicates an attempt to drive traffic to external sites.

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.com/pify?keyword=attention+deficit+hyperactivity+disorder+2020+pdf In PDF document text
    • http://files.fflinstall.com/uploads/1/3/0/9/130969999/bedatowitopavij.pdfIn PDF document text
    • http://files.legacybuildershc.com/uploads/1/3/2/8/132814220/miseworuzusir.pdfIn PDF document text
    • http://files.violinstringreview.com/uploads/1/3/1/3/131398091/93bfd50a438.pdfIn PDF document text
    • http://files.premiertags.uk/uploads/1/3/0/9/130969683/1bc79209ea22.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/1/0435/2756/9576/files/93348129346.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/3612/8933/files/52140356011.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1401/9496/files/70277167235.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9899/5877/files/61540920859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8998/4674/files/tagopel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/84783369736.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88020392138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4037/2896/files/95066062142.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3373/9932/files/nivimapibamovivavekalusil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/11953998090.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1460/files/nivomuzasigegitekudizone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2521/1298/files/9556606386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/5165/6102/files/80003116654.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_off0000725c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725C 5424 bytes
SHA-256: a61032d70341faeec182cde08fc982c6c8fe1c638b6eabda0748ff53b7fb81f1
font_01_sfnt_off000084cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 9768 bytes
SHA-256: 3e03fae291340b50d1a5b8620b3d34ec241d4b4a6b26744cc64a6ac4604ca50e

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