Malicious PDF — malware analysis report

Static analysis result for SHA-256 6df989e2f9983e0c…

MALICIOUS

PDF

47.1 KB Created: 2020-08-14 19:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 211ea26f20b635c83715ca4dd78631e1 SHA-1: 3ba9af71a78bd71cf073995d782b4352f5843ae8 SHA-256: 6df989e2f9983e0c552129b4ff86d9263582a8c2a0df24a87c0c9daa8196b467
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple links to redirector infrastructure, specifically pointing to a lure for 'castle clash mod apk free'. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms that the primary URL, https://ttraff.cc/pify?keyword=castle+clash+mod+apk++free, leads to known malicious redirector infrastructure. The document body, though heavily obfuscated, also contains this URL and numerous other links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic to distribute the malicious payload. No scripts were extracted, but the presence of malicious redirectors and the lure indicate a phishing or social engineering attack.

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=castle+clash+mod+apk++free In PDF document text
    • http://files.aprilnieves.com/uploads/1/3/2/6/132681757/guwapefuje.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/1/0433/6638/3768/files/2357833768.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4841/8971/files/54001977512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6467/1909/files/awards_and_honours_2020_and_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/6599/4392/files/vopumuvulelazakuxuliloboj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/nikuxisiwilij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/77496931433.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1124/3162/files/6874121748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vekedexixerokasadoboma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6230/5702/files/jajezuturoderizejowawane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/pejuxemeteferekuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3598/9915/files/munoxaw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E9 5364 bytes
SHA-256: 34e7046203acc4b4c174cfad8ce943cbbf9bca73bef2254b33f3686b2de0e503
font_01_sfnt_off000076fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76FE 10128 bytes
SHA-256: c748fda0d4747b29ea283eb6dccf2f8ba0b9645e8f431a57bf331d4ad3d82b9a
font_02_sfnt_off000099f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99F4 16160 bytes
SHA-256: 49898e49e877ec90855fa0b20ec776352fbbc9c6da67f9354d1218dc46407470

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