Malicious PDF — malware analysis report

Static analysis result for SHA-256 af270fda23747f59…

MALICIOUS

PDF

40.7 KB Created: 2020-08-16 00:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 331b254371e4e2647e93a1f22c989436 SHA-1: a3d2c9448ec822930f6167ae8fa736688d9d129d SHA-256: af270fda23747f5922edb5a26ce1e1f4e0ad4c45a2cc507138f3360b20373f23
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=chuuk+airport+information'. The document body, though partially corrupted, also contains this URL and other links, suggesting a lure to trick users into visiting potentially harmful websites. The ML classifier strongly supports the malicious nature of this PDF.

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=chuuk+airport+information In PDF document text
    • http://zaposam.shopcoppercow.com/uploads/1/3/0/7/130739860/8800909.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/1/0434/7399/3890/files/91787177925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/30525912749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2060/6885/files/37760908024.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2536/6165/files/26101182311.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6378/6137/files/autumn_leaves_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5056/files/vated.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5999/4014/files/67406485387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/buxidumex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7188/8803/files/xijitepasupatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7950/7875/files/39219177210.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7344/4771/files/jurnal_behaviorisme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/70735166389.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2531/8563/files/what_timezone_is_california_in.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/2441/1806/files/administracion_hotelera_2_alimentos_y_bebidas.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 2

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_off00005919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5919 4900 bytes
SHA-256: 84aad21b6fb5b9b21808a56c20c8e46e0753cc53bd1f73b1ff7ca4ddde4990ab
font_01_sfnt_off0000699d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x699D 14376 bytes
SHA-256: fd3abdf859938cda7f901773ae206dfeef16d3cdea70788f2891e3928c0b3a04

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