Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23cab421ff1d5c2…

MALICIOUS

PDF

46.8 KB Created: 2020-08-15 08:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1a2ba6defd9b01790a72e64454112380 SHA-1: c0828b3cbc20c9ed8b15f3550a57d46c0bd40bdd SHA-256: d23cab421ff1d5c2446a2d4b26b8a3d79c7d16a4af1ec9a9a55ade35410bc2c7
194 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector. The presence of a PDF link farm further supports the attack pattern of redirecting users to potentially harmful sites.

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=angular+2+form+control+get+value In PDF document text
    • http://files.uogcbssc.ca/uploads/1/3/1/0/131071114/cdc690.pdfIn PDF document text
    • http://files.trojerestaurant.com/uploads/1/3/1/8/131857115/mokapememunu-zelenarixiva.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/1/0428/7230/7875/files/xanupobej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9141/1615/files/12550750078.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3941/4677/files/93633113953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4042/files/lakorojitutofoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/48336412937.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7729/6543/files/windows_7_professional_activation_crack_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/hsbc_bank_mandate_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/59859289543.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5467/7668/files/zokomom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6498/3703/files/fimikotazotexitavifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/107911944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7790/3263/files/8958120080.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2508/9191/files/xefav.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 8

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_off0000795d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x795D 5204 bytes
SHA-256: b8aedac160d08b5a342c55a6bdbcdc9f699d8621fdeb49e8bd3daaf09a33a77c
font_01_sfnt_off00008b02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B02 10288 bytes
SHA-256: f959363c2b7dfc94df335e7c129a8e562f7ff1cb457fe86dfd3f86c99c53bf02

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