Malicious PDF — malware analysis report

Static analysis result for SHA-256 aea8298804c3e1a4…

MALICIOUS

PDF

34.3 KB Created: 2020-08-07 19:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d995dcb425af28d3a102387e679ac6f3 SHA-1: 17b273099fe9f611d14342cafe3b89c27f2acf7d SHA-256: aea8298804c3e1a45dc01f6e9fd9eacd7ef63fef4309280bf9ee87e4a5cae1d5
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a redirector link to a known malicious infrastructure. The document body, though partially corrupted, contains text related to 'biochemical tests' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly supports the malicious nature of this PDF.

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=biochemical+tests+for+identification+of+medical+bacteria+pdf In PDF document text
    • http://files.childprotectionresponsecenter.org/uploads/1/3/2/6/132695714/df9ed990b.pdfIn PDF document text
    • http://files.our-topia.com/uploads/1/3/1/6/131606347/moduxe.pdfIn PDF document text
    • http://jixanane.razorpedia.com/uploads/1/3/2/6/132695329/paleliwawujobuk.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/1/0434/0645/9032/files/tetododolitoduwekopiju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2150/8509/files/jekusuripibewoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/rugemewubukojepozado.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3464/6440/files/gubiluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7725/5836/files/18878510908.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1206/3391/files/a_noite_dos_mortos_vivos_livro_pdf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/zonirolugukasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3197/0460/files/zesusapuwofagam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/zixafuxiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6577/6030/files/jojijoxulikin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9340/8409/files/miravijet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8328/4132/files/lowawetomofanosutepen.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_off00004802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4802 5584 bytes
SHA-256: 3ea93be61974c3ae64a1d7357a6a2ba57504adda0e6f87fa40888f9b226f028c
font_01_sfnt_off00005acc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5ACC 9708 bytes
SHA-256: 906ac4110f32f06c65533e5ad1c825e50a974372598420212d33d885d8bc97ea

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