Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28dc58adc0de778…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 01:24:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ed22adc8551b95ff7a249c5d0579e19a SHA-1: ca8b0eb95863152dab9a28fb6585326a7f5144cd SHA-256: f28dc58adc0de77890b3624c090b82d9461a48565bf5e93843cedd85884c181f
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'anorexia y bulimia tratamiento pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of a link farm further indicates an attempt to distribute malicious content or manipulate search engine results.

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.ru/pify?keyword=anorexia+y+bulimia+tratamiento+pdf In PDF document text
    • http://waxavo.festivalontheave.org/uploads/1/3/1/0/131070786/jafisugedesere.pdfIn PDF document text
    • http://karuso.wessexmaternityacademy.org/uploads/1/3/0/8/130874232/sebuxabibusura_koxiduraragapix_memaxetodukofi_kuripiji.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/mla_citation_machine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8656/8860/files/25119940093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/rulenufapafurira.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6099/2927/files/wovofomonusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6113/2968/files/36329741006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4853/3142/files/42951514938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6871/7216/files/elementary_statistics_triola_10th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3223/9528/files/7835811748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/17083857765.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 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E1 5188 bytes
SHA-256: 974d402fecf889d0ebd6a3a7e0634aac5a3227467c918ef246f8e55cbd759b78
font_01_sfnt_off00006b68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B68 9684 bytes
SHA-256: cf08ab8930ee1705e48ef4da858eb91796bca8e2e9dcf362ffc4bb254324b1c6
font_02_sfnt_off00008c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C7C 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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