Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e2b24f6db5d4873…

MALICIOUS

PDF

45.1 KB Created: 2020-08-21 06:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 31cbd226faba234854ba6027a7834caa SHA-1: d77813388b9a45c5524cd80d28017e48361ae174 SHA-256: 1e2b24f6db5d4873340c7ec1c5634d1c75aad977a7fe0121e7cd591bbd6dc48b
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to 'reading comprehension worksheets' and includes the malicious URL. The presence of a link farm further suggests an attempt to distribute malicious content or SEO manipulation.

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=free+printable+reading+comprehension+worksheets+8th+grade In PDF document text
    • http://files.portiaresnick.com/uploads/1/3/0/7/130775471/mevuzavukekusu-zaken-jerila.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/1/0432/8023/6702/files/blanche_bailly_bonbon_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1384/7710/files/faxuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7086/6076/files/ignou_bca_solved_assignment_free_2018-_19.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4556/0226/files/74082283097.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4855/1068/files/nopibizuju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7926/2615/files/pilatikosofevafe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0396/0731/files/editing_documents_in_word_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6214/0826/files/20940737202.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0056/9766/files/essential_business_communication_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4681/3344/files/navalonefojoneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8542/5829/files/atelier_bow_wow_graphic_anatomy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2241/7046/files/alcoholic_liver_disease_pathophysiology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3128/8216/files/64682977059.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 3

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_off00006a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A63 5932 bytes
SHA-256: 32c2fdb20111c31f944e3b9035549ec96895b307c30f0024f2445715ed0f5291
font_01_sfnt_off00007e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 12096 bytes
SHA-256: 6782915092df6936c5d6937fc0c4cf4e7a3a1b06a5324f86d230e31abf804891

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