Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f5e35052de12a0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 02:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a2b0cc46b8725bfa2c9f863e79c465d1 SHA-1: 15e25280651380cb159eaa7b4026c07a83342d57 SHA-256: 56f5e35052de12a0ea66d95b6e612a1dd7907c4f2ac27976e1ab3a323ba4b236
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one specifically identified as a malicious redirector. This suggests the document is designed to lead the user to a malicious website. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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=sistemas+abiertos+termodinamica In PDF document text
    • http://files.discoveryelectricbikes.com/uploads/1/3/2/7/132710661/bekixifawidikojod.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/1/0429/2021/4681/files/96965687511.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/kezoxonototowozek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3283/0106/files/ramadan_calendar_2018_dubai.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/kingroot_4._0_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9018/1286/files/99318335982.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/fifuwesizazadogino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/nazexagozuwoji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/zitemofonoxizuboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/wawigukaxibuvawi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/atlas_copco_air_compressor_maintenance_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/342050344.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_off00005fae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 5296 bytes
SHA-256: 6120788c38fca5cc25624534a991bd473e547c632a39b96f7deff649e3adadd8
font_01_sfnt_off00007181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 10628 bytes
SHA-256: 3c187e50e4331e445f1f0a7a4a435005cc006a773e4f643f4c8c005d303a8175

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