Malicious PDF — malware analysis report

Static analysis result for SHA-256 87129828f68f0f35…

MALICIOUS

PDF

45.6 KB Created: 2020-08-08 05:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9341cc5cf01fddb964c20708b2878b47 SHA-1: ecf2e0474437a7490e116b55a67b465df8d69605 SHA-256: 87129828f68f0f35855eaf4dbf999b2e542e5d09fbd09322603743960dc67d32
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one prominent URL pointing to a known malicious redirector. This redirector is likely used to funnel victims to phishing pages or download further malicious content. The ML classifier also strongly indicated maliciousness, supporting the presence of a malicious redirector and a link farm designed to appear as legitimate PDF resources.

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=pl%25C3%25A1sticos+biodegrad%25C3%25A1veis+pdf In PDF document text
    • http://files.bensawyermusic.co.uk/uploads/1/3/2/7/132740218/kelupotamevivok.pdfIn PDF document text
    • http://files.sherieunfiltered.com/uploads/1/3/2/8/132815961/a59b4b501cc8.pdfIn PDF document text
    • http://files.kcactf5.org/uploads/1/3/1/4/131437941/0c2f89a7b246f.pdfIn PDF document text
    • http://files.drvinge.com/uploads/1/3/2/6/132695195/gajamodap-vilanaxifeja-dipine-dorarivufokeri.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/1/0436/4464/9630/files/80363202293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/87899810879.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4157/0466/files/24518523225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/automated_testing_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/boluvurudibabekupugak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9695/7343/files/44900531894.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6119/files/carrier_air_conditioner_brochure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/51715646103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5622/6716/files/majizetonepexajaba.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5622/5688/files/lotatunepapewesikok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1818/1016/files/64978671490.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/48054684450.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_off00006eb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB4 5760 bytes
SHA-256: f8f4a73820f4dbe7f615ac36827ea5d02e906c0d2cc5e5187a02910bb5ac804b
font_01_sfnt_off000081d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81D4 12504 bytes
SHA-256: 241ac4e546e7f578f37e0667cfc4c44a008337f6cf1c3ad7c5d92c03038f3aff

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