Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a16e9b204ea5efc…

MALICIOUS

PDF

40.1 KB Created: 2020-08-19 08:48:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 136dd683e8a219cdce214e305f79cb9f SHA-1: f41e0f5c74b73961bcc439ce0ffa37cbbed89da3 SHA-256: 5a16e9b204ea5efcd5494ee70ece00f32304887a56802efe866df9152bd6ecaf
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a malicious redirector. The presence of a large link farm suggests an attempt to manipulate search engine results or distribute malicious content through seemingly benign documents. The ML classifier also strongly indicated maliciousness.

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=wind+chimes+sound+effects+free In PDF document text
    • http://files.greenchairpictures.com/uploads/1/3/1/4/131453897/modagovum.pdfIn PDF document text
    • http://files.crystal-river-healing.com/uploads/1/3/0/8/130813982/9a877e15c77612.pdfIn PDF document text
    • http://mobojoza.nikdhar.org/uploads/1/3/1/1/131163599/a55080.pdfIn PDF document text
    • http://mufej.evaatkinson.com/uploads/1/3/2/7/132712323/7a71d.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/1/0433/1575/7214/files/narig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0671/4268/files/auxiliaire_etre_et_avoir_cours.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4154/4599/files/ww_wimp_com.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9561/1809/files/dragon_s_dogma_cursed_carving.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0843/4081/files/pemeboworoxogiri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5453/7624/files/asmaul_husna_a4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7152/7325/files/nunogijuxutonijafemepojel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/65354798479.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_off000057f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57F2 5032 bytes
SHA-256: e122a7004f23819ab72e08dffc1d125d1fcb01024d4a313105020b460ef93015
font_01_sfnt_off000068ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68EA 13408 bytes
SHA-256: 319c34227e413caab2363a74934a5d7c8c39e45e95ed950f18ebcf5e73d6bb1c

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