Malicious PDF — malware analysis report

Static analysis result for SHA-256 51bec82da992f298…

MALICIOUS

PDF

47.3 KB Created: 2020-08-02 23:01:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b1971362a337e70c81ca40f4a2ac7d06 SHA-1: 7cd7c72630f559ad518db87c234085dcb59e9eb4 SHA-256: 51bec82da992f298b07cfe58aa671b07035fdc2139c4653d78fe270e1386247f
194 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link leading to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that redirects to a page related to 'Escape from Tarkov', suggesting a lure to entice clicks. The presence of numerous PDF links, many hosted on Shopify, indicates a potential SEO poisoning or link farm strategy to distribute malicious content.

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=escape+from+tarkov+inventory In PDF document text
    • http://files.newjerseyparaunityexpo.com/uploads/1/3/1/0/131070313/xaxevalekuvetiva.pdfIn PDF document text
    • http://files.lbcbraddock.com/uploads/1/3/1/4/131406892/tinunurafesugonenunu.pdfIn PDF document text
    • http://files.coachmo.net/uploads/1/3/0/7/130776728/0e0d92c2.pdfIn PDF document text
    • http://files.historicnorthampton.org/uploads/1/3/0/8/130874134/mixajem.pdfIn PDF document text
    • http://files.somdarts.com/uploads/1/3/2/7/132710491/gadiwenon-fijofaxanatos.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/1/0431/7170/9092/files/wilabebalizidomowesa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/wegaxulijibinokudibomajum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1634/8057/files/59748613191.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3305/9737/files/33719409398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1853/4557/files/10535705692.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4714/7928/files/46851835643.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/51472496299.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/kekasuweguzexazowimamujav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/nitupimizofameruvenol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/85491274592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0888/3870/files/xivavu.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_off00007b50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B50 5312 bytes
SHA-256: efe6e6a6d338b4de08350b3728194b0a57420db0c069d6f10ff1813c991f4f8d
font_01_sfnt_off00008d6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D6A 10100 bytes
SHA-256: bf89501944d1e6dbfc16980ad96261aafcf76b7d92aefbd81ae2c47d74ed0d5c

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