Malicious PDF — malware analysis report

Static analysis result for SHA-256 a890ee1efe0a8102…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 10:18:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 778700ce9cdc29a85a34d63cc1a8811f SHA-1: 21d3dd1f716bebd0ec96b8511786fb652574c133 SHA-256: a890ee1efe0a8102797a89eec715c2590a84d582c4dc20d7cec318221521e979
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'logo quiz' and includes the malicious URL. This suggests the document's primary purpose is to redirect users to malicious 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=logo+quiz+expert+level+answers In PDF document text
    • http://ludipipe.healthplexfamilyclinic.com/uploads/1/3/0/7/130739860/e716e242debb73.pdfIn PDF document text
    • http://files.joantrinhpham.com/uploads/1/3/2/8/132814241/9016462.pdfIn PDF document text
    • http://kelemi.bitsandbobsmv.com/uploads/1/3/1/4/131437515/dojarafub.pdfIn PDF document text
    • http://files.obriendevelopments.org/uploads/1/3/0/7/130776821/metesoxol.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/1/0434/1586/3452/files/60862562206.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nebisineseboji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/icy_veins_destruction_warlock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/nojamuregu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/5500/2279/files/false_ceiling_materials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/sesopelafajimunano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7827/0619/files/17736877723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/2444/5603/files/kugobebub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/67279733654.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/69172214016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/arduino_mega_specifications.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 2

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_off000060a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A9 5324 bytes
SHA-256: cf4b1ccb07d0325e4d7196e85870a8cd99d693640843182bd9ddf3624f648c22
font_01_sfnt_off000072fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72FA 10088 bytes
SHA-256: 7ae1cc22b16d0015a21685cd15166ef0aaa0daec6a7be286ce62a64fce70684e

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