Malicious PDF — malware analysis report

Static analysis result for SHA-256 d97cf1362a731c75…

MALICIOUS

PDF

37.1 KB Created: 2020-09-20 07:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 02107ae1798d24bf9260e2a32928ec6f SHA-1: 619603a392431e03daf9fd785eb6ca00bd4d6096 SHA-256: d97cf1362a731c75ed0fec485f22509a7430bc3878f6fc0c014026ca17004959
194 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a primary malicious redirector and many links to external PDF files, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample.

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.me/wix?keyword=cuento+no+david+no+pdf In PDF document text
    • http://rusul.tedhayward.com/uploads/1/3/1/3/131379699/3890199.pdfIn PDF document text
    • http://jokopo.mothersylvia.com/uploads/1/3/0/7/130738824/sakusakelak.pdfIn PDF document text
    • http://files.hillfarmhistoricalsociety.com/uploads/1/3/0/7/130776680/4131100.pdfIn PDF document text
    • http://siven.dontworryaboutme.com/uploads/1/3/1/3/131378950/magusesewemido-gaxisuravewur-mukonurar-zoxolikuweriwa.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/1/0436/4579/6512/files/woxevekototaporilube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6318/0438/files/fable_treasure_clues.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3147/7922/files/whirlpool_duet_washer_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/68920443416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6908/6622/files/ielts_academic_speaking_part_2_with_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0069/1862/files/xoduwazuxirepoxereri.pdfIn PDF document text
    • https://d049ef2d-106e-4dc2-82cf-c91d3874b60e.filesusr.com/ugd/debbe1_e2ceca523534431f94d061dfcf6bf3a8.pdf?index=trueIn PDF document text
    • https://15d58ce7-da52-4ceb-9305-41a860fc0774.filesusr.com/ugd/e80f4c_2178a56db9504ed8b0983396bf889e92.pdf?index=trueIn 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_off00005543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5543 4696 bytes
SHA-256: 5197abb310172496fc3f633398ad50e9a8469bd341191def6c4fb3dd2b996822
font_01_sfnt_off0000655b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x655B 10212 bytes
SHA-256: b3417372058b4532118ab314126925e1ff4f05d7248f58dcf44737f8069cb6b0

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