Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bedca28553099ea…

MALICIOUS

PDF

40.9 KB Created: 2020-08-23 07:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 0ff290372e865267230370a91e708629 SHA-1: d07ff3fcf55187edd3741000274ba4d31a7d1c58 SHA-256: 4bedca28553099ea98515c67a02d150be54d052175d8769cff06b0cf97d7e2da
194 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded URLs, with one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting a tactic to manipulate search engine results or distribute malicious content. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector URL and the link farm pattern strongly suggest a malicious intent, likely to lure users to harmful sites.

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=animal+crossing+wild+world+hair+guide+color In PDF document text
    • http://files.ourdivecenter.com/uploads/1/3/1/4/131407135/6359097.pdfIn PDF document text
    • http://porebiv.thewholechildmatters.org/uploads/1/3/0/8/130874066/da141502630106d.pdfIn PDF document text
    • http://nerizatig.pslerevision.com/uploads/1/3/0/8/130873951/c1008.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/1/0433/8266/9461/files/27343649516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/canon_elph_180_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2881/5783/files/50326039454.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0949/9558/files/6066969876.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6770/2432/files/lexique_de_l_argumentation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/0252/7645/files/buxozix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7665/7051/files/aggiornamento_android_9_honor_7x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/depawedekinid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4361/7948/files/honda_recon_250_manual_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2580/files/mtv_true_life_episodes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/nozejem.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 4

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_off000061fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FC 5436 bytes
SHA-256: 786eaedf9190e6404ada385b89f508911c6f9ebd8f02791bd241c57f099a1eca
font_01_sfnt_off00007442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7442 10060 bytes
SHA-256: f287cce16bf889012d6bbb36fcd163d2dd5b45d2616856539c3647a32d71ea89

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