Malicious PDF — malware analysis report

Static analysis result for SHA-256 4484a34e5ffe56ae…

MALICIOUS

PDF

49.2 KB Created: 2020-08-26 20:57:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 80d596ab1459c4ca7f620dcfe1342d68 SHA-1: b6342e44839e330bf43c9f1adee179606817c208 SHA-256: 4484a34e5ffe56aefb97f7bbe09cdd36b02ee4bdf94e5d040e18957a9eeed7bb
194 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the redirector link. This suggests the primary purpose is to redirect the user to a malicious site, likely for phishing or to download further malware.

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=livro+conversao+eletromecanica+de+energia+pdf In PDF document text
    • http://files.yoga-infusion.com/uploads/1/3/2/7/132740700/6044177.pdfIn PDF document text
    • http://wasafezip.patrickandjohn.com/uploads/1/3/2/6/132681946/e1c91.pdfIn PDF document text
    • http://files.superbloomcoffee.com/uploads/1/3/0/7/130776645/3705443.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/1/0434/3742/4807/files/atom_linux_mint.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5863/4658/files/78511835370.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5264/5017/files/eliciting_sounds_wayne_secord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4610/9345/files/sabafumosepepibenugad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/99914628395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0432/9125/files/tobixifa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/nezonifarovotazebalugo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/kapixagiralezowele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/audacity_mac_os_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fovurasavelibegesixaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7954/8580/files/xonorilewosefu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9105/1161/files/18106098354.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0967/7224/files/toruv.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_off0000791e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x791E 5476 bytes
SHA-256: 4765e82d3d1d3b2fb39a897c47cc4d6592f5d4bd686f389405573e1a433727e7
font_01_sfnt_off00008bab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAB 14248 bytes
SHA-256: 8100c8b597bc311a038d1580f06756a71bc5c867558f04bf1e010140c4dcd1b1

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