Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca83d8e5adc3ad98…

MALICIOUS

PDF

49.2 KB Created: 2020-07-27 20:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c47b056db2a8c6b80f9a522b5297f13c SHA-1: 28c52db43302edd72a8a170524612f9330d2fd1c SHA-256: ca83d8e5adc3ad98ec2629f47122c18fd9e96ba2ca18fe137b60da47f65605ac
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a redirector service. The document body, though heavily obfuscated, appears to be a lure related to 'best casual android games 2018'. The primary heuristic firing indicates that the PDF links to known malicious redirector infrastructure, suggesting 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=best+casual+android+games+2018 In PDF document text
    • http://files.eguastella.com/uploads/1/3/1/8/131871690/4656610.pdfIn PDF document text
    • http://files.lafortuneracecars.com/uploads/1/3/0/7/130776262/8397540.pdfIn PDF document text
    • http://files.loveandmercyfdc.com/uploads/1/3/1/8/131857071/tazowirujuvimi.pdfIn PDF document text
    • http://files.wilcoprevention.org/uploads/1/3/1/4/131437740/29b296.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/1/0429/3227/3319/files/tejal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3161/6918/files/93488049885.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8476/6620/files/kamufeweferukukudobitine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4638/5317/files/61765476283.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6109/2245/files/271368886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3707/3314/files/ratoxupozaxanes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6859/6117/files/54615458179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/26693168294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gamefidijuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8871/5682/files/mawipono.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/84511803825.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rokagarunawawutasa.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_off00008028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8028 5708 bytes
SHA-256: cf6fa93ce565fcaeff45a61aca5470fdd17ea8a2c93583d8192d6615b8880cbc
font_01_sfnt_off0000936a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x936A 10484 bytes
SHA-256: ec910190c22e5175c50a9df4d1da54ee11e869f24e82b75c2b1743c1601ad6c7

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