Malicious PDF — malware analysis report

Static analysis result for SHA-256 a479866f4b156ccf…

MALICIOUS

PDF

40.7 KB Created: 2020-08-09 10:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d7c7f0babf07087d3f83fe721bfb3f51 SHA-1: 4845d72405a4fa2e0bb7016c60ee92661dd7ae7c SHA-256: a479866f4b156ccf7ced87823fb98fde1151a269f4ecb3a755887f362d8065dc
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF as malicious. The document body text is obfuscated and contains a URL that appears to be part of the redirection chain. The presence of numerous links, including one pointing to a known malicious redirector, strongly suggests a phishing or malware distribution attempt.

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.cc/pify?keyword=am%25C3%25A9lioration+continue+kaizen+pdf In PDF document text
    • http://doled.eatdancebreathe.com/uploads/1/3/1/0/131070420/mojugir.pdfIn PDF document text
    • http://files.glamorouspeachboutique.com/uploads/1/3/1/4/131407148/rebufotiwizi-xamobenox-bupudamevame.pdfIn PDF document text
    • http://files.chasehillschool.com/uploads/1/3/1/4/131454102/8d8a957c201718.pdfIn PDF document text
    • http://files.sweetteasweettreats.com/uploads/1/3/1/4/131408245/3283174.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/1/0437/4046/3255/files/50341532305.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8859/3571/files/sevosaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4555/1271/files/24719193157.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/50605010046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2065/6545/files/xejudaguzezuwum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2299/9964/files/adrenergic_drugs_medicinal_chemistry.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5986/3959/files/los_arcturianos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4976/2459/files/fenugilok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/25488422345.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_off00005e94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E94 5368 bytes
SHA-256: 67d9fd1f5ca6873a0dcaf9108c766c942f85dcf2869460a77e07cc511c32972b
font_01_sfnt_off00007086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7086 11348 bytes
SHA-256: b22f5dadf39210aaa410d8aa1cd6af1a3ec2efedb27d951594277429ac10c969

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