Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8ad5c61a78e6e81…

MALICIOUS

PDF

46.3 KB Created: 2020-08-07 23:22:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0375e57435690c7010f01e348c6e597c SHA-1: 40e4710513c9e47f33a3312ed81d79c9ae7449bc SHA-256: b8ad5c61a78e6e81c779e7deda346300fa3f4c09379975be7bbe3419162218aa
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with multiple links pointing to Shopify domains and a primary redirector URL. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary URL, https://ttraff.cc/pify?keyword=metro+rio+de+janeiro+mapa+pdf, leads to malicious infrastructure. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this PDF. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF files, suggesting a lure to download further malicious content.

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=metro+rio+de+janeiro+mapa+pdf In PDF document text
    • http://files.pekoeandimp.com/uploads/1/3/1/4/131437878/ed9cd30f03.pdfIn PDF document text
    • http://files.movementinventionproject.com/uploads/1/3/2/6/132681482/9487a26e1.pdfIn PDF document text
    • http://files.createleadersnow.com/uploads/1/3/0/7/130740249/2181253.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/1/0433/0687/7080/files/2033782386.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84593422723.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/22146652762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/karagokupoxavinolojonop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9785/8972/files/vejoxejopimedevufete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4381/4556/files/45101320718.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0965/4440/files/sorting_algorithms_in_c.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4204/4066/files/sifebexusabuxogagofuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9411/4455/files/free_download_spoken_english_book_in_gujarati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1915/6130/files/kemofarujetikatit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2326/9014/files/fokakemubol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1775/7095/files/adrenal_insufficiency_guidelines.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1022/0447/files/16136762666.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 5

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_off0000754a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754A 5056 bytes
SHA-256: 82c8440e88ba7013bcb4996738cacd33b7c28a513b411da59eae8031bdbc0987
font_01_sfnt_off00008677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8677 11236 bytes
SHA-256: 31bb7e0b6e4aa36afb8f9a7da22a0b81e115d8e6288519658cd02ee8ee27db41

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