Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b84e6fcfe377c6d…

MALICIOUS

PDF

40.0 KB Created: 2020-08-27 23:44:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: db9a9f7f8395643e7a1542a7fdd29cc5 SHA-1: 76db9d2001533d4a9ec4b7527948941861f8316b SHA-256: 8b84e6fcfe377c6d4b7c46f4ce37461684870b114efff06e0c3d598a5b84bd78
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting the primary purpose is to lure users to malicious infrastructure. No scripts were extracted from this sample.

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=calcul+eclairage+aquarium+eau+douce In PDF document text
    • http://files.neurotrials.com/uploads/1/3/1/6/131636682/1356404.pdfIn PDF document text
    • http://files.johndollar.org/uploads/1/3/1/4/131482832/zanixeri_vonokovo_labejasoxunito.pdfIn PDF document text
    • http://files.downstateoutdoors.com/uploads/1/3/0/8/130814353/risetu.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/1/0430/5495/6695/files/48133388576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/38664456414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9821/7374/files/84348801428.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/2488/7456/files/braindumps_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/adenitis_mesenterica_en_nios.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/7224/0293/files/fajare.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7789/4293/files/barbarians_at_the_gate_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/fafebadekekevelipixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6455/5680/files/38088988888.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tadigepulimo.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 2

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_off00005e4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4E 5112 bytes
SHA-256: 5b7789f0652ab4001c49b95f1b79c878856b170c85c5cb5a7efd153406b19dcb
font_01_sfnt_off00006f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F81 10572 bytes
SHA-256: 8d3a893e827df94de6048fb94cfabeb7633a9a6fed069d6f15490741b2230de4

Open this report in the interactive analyzer, or submit your own file for analysis.