Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c83eb3db44e9019…

MALICIOUS

PDF

47.1 KB Created: 2020-07-31 08:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5dacee3800dc0cf800065f1fe53250d1 SHA-1: 7643e2a16dbe9cef48bb6399a64026366d017a28 SHA-256: 4c83eb3db44e9019e52f57a7af38d6b4cf8b707fe3435d9d191d5b0b86c8208e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains embedded links that redirect to malicious infrastructure, specifically a URL associated with a redirector. The document body, though heavily obfuscated, suggests a lure related to a "rifle marksmanship manual". The presence of a PDF link farm heuristic indicates a large number of outbound links, likely for SEO manipulation or to distribute malicious content. The primary malicious IOC is the redirector URL.

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=army+rifle+marksmanship+manual+pdf In PDF document text
    • http://files.pnagkc.org/uploads/1/3/0/9/130969032/3b92394b34.pdfIn PDF document text
    • http://files.mysustainablefashion.com/uploads/1/3/0/7/130776682/pozobemogu_naniv_dibibekepa_niwugab.pdfIn PDF document text
    • http://files.mindbodycounselingllc.com/uploads/1/3/2/7/132740294/9a8a4e95547d.pdfIn PDF document text
    • http://files.rondix-flatcoated-retrievers.com/uploads/1/3/2/6/132682790/ffe74.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/1/0430/1894/4665/files/wuwowegavidipojemutowiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/29386122070.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0312/files/50604628783.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/jekulodiwumuronuzanak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/limakoguke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4508/4574/files/63225556566.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5831/4912/files/nabadogujegobiwipu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4790/3654/files/wogijigadibufanakubakip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4551/7469/files/fomada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzibuwusupamodugibeboz.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_off000079e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79E4 5128 bytes
SHA-256: b8b98db94b64ea5ed592989f6c197c23692293aa3bdc2246ed3169abcca66745
font_01_sfnt_off00008b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B18 10804 bytes
SHA-256: 473b5ba828f27746f6b8d4d0576a36cc8252de388f66fc93ea481d9c87107459

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