Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d9dab04574585fb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-22 17:33:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 255e2919400c6fae559ae69d28b5736d SHA-1: 4251af1040fd4f9942dbf1030add846b8d5d3312 SHA-256: 4d9dab04574585fb0b0d869f7b85658e46bb973c05fc10f512d8b839fd409235
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 malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to a known malicious redirector. The primary attack pattern involves luring the user to click on these links, which are designed to lead to further malicious content or compromise.

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=arquitectura+contemporanea+caracteristicas+pdf In PDF document text
    • http://niniv.thechildrenspiazza.com/uploads/1/3/2/6/132695213/zujisavi-tivovojuv.pdfIn PDF document text
    • http://files.suryateguh.org/uploads/1/3/1/4/131438541/956406.pdfIn PDF document text
    • http://files.skramstadprimitives.com/uploads/1/3/0/7/130775434/nosejumenatomu.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/1/0433/4849/2438/files/14765064380.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/suprema_biostar_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0496/0676/files/56956019946.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4543/7083/files/buzolilabudadox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6589/2245/files/59938509726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5593/9733/files/muvewelefis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5513/5390/files/everything_under_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6355/8815/files/sivabitosobulaniv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1402/8444/files/ready_player_one_book_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9828/3940/files/characteristics_of_low_self_esteem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/turufufekesuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9541/7237/files/bofitek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0304/2216/files/raninojifamafazoxobiwagez.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_off00006ddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DDC 5384 bytes
SHA-256: aa717688097df5cbbc0ada8b497ef6b83c364a864dbbd00d6d59aec15c488a39
font_01_sfnt_off0000800e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x800E 11336 bytes
SHA-256: 8293e15b1a925a3af85ffa2b2b322b42d4474f6770620b5562a6f97755d93254

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