Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a91ea4198364b42…

MALICIOUS

PDF

40.8 KB Created: 2020-08-09 13:17:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 26bf79082ae1d9162d6504d06cd61b0c SHA-1: 0b6320e188578fe813990c1e5c3ba7a977467289 SHA-256: 8a91ea4198364b42e2222966f09ecb396643db9befd133772470fe709aaa06c0
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Reasoning deductive and inductive pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier strongly flagged this PDF as malicious, and the presence of a malicious redirector confirms the intent to lead the user to harmful 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.com/pify?keyword=reasoning+deductive+and+inductive+pdf In PDF document text
    • http://bitor.mlkccnc.org/uploads/1/3/1/6/131606490/6966688.pdfIn PDF document text
    • http://nibafupon.maysmarketplace.com/uploads/1/3/2/7/132710621/4fbb2b91282789f.pdfIn PDF document text
    • http://files.ryansullivan.tv/uploads/1/3/1/4/131438639/fafetaroto-pojikitakog.pdfIn PDF document text
    • http://files.fabricairsa.co.za/uploads/1/3/0/7/130775623/f47a4bf.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/1/0435/2750/4032/files/60193023602.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4016/9384/files/3449939502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3059/4204/files/8510509271.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9194/files/58864736507.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2166/2365/files/creation_story_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/origen_real_y_aparente_del_nervio_facial.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5323/3814/files/55094019132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4639/5304/files/mukowatigowa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3550/8387/files/bruma_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8567/6192/files/o_estado_liberal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7265/8335/files/85542993431.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2702/1480/files/wuduxexujomor.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 4

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_off00006158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6158 5264 bytes
SHA-256: 1970096dc94004852ed9d878b987d0c4718cb1393052893c37f5618dd858e5a1
font_01_sfnt_off0000736b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x736B 10148 bytes
SHA-256: 7c2737fb38fd93f6e6755920e5a6d7c1145e2e9002ea053cfbb7a3d0943f1a15

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