Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50f569424ce502c…

MALICIOUS

PDF

36.7 KB Created: 2020-08-08 08:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6d6437c2fe9b97c2dd6bd054612df727 SHA-1: 5194a657bfad29aba290711190ab8c5a9e8c5b5a SHA-256: a50f569424ce502c612479a5a5572978b355eec1ed292cca3dc326e186c1fd6a
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, with one identified as a malicious redirector. The document body, though heavily obfuscated, also contains the URL 'https://ttraff.ru/pify?keyword=auriculoterapia+terry+oleson+pdf', which is flagged as malicious. This suggests the primary purpose is to lure users to potentially harmful content through a link farm.

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=auriculoterapia+terry+oleson+pdf In PDF document text
    • http://files.breakthechainfitness.com/uploads/1/3/1/4/131406563/9907569.pdfIn PDF document text
    • http://files.thenourishedbump.com/uploads/1/3/1/4/131453215/bca0c1f53b8179.pdfIn PDF document text
    • http://files.moraconference.org/uploads/1/3/0/9/130969440/bapuwowur.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/1/0431/9635/0624/files/calma_emocional_bernardo_stamateas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/gepotako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3614/5814/files/95754713687.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6572/9429/files/15644856374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0210/9856/files/nipovezifejuritogike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7328/2983/files/51375508762.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/9714/2936/files/clinical_pharmacology_of_anticancer_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0756/5214/files/wefudomenotusunane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5077/0333/files/wupuvazuwide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2047/6828/files/26420898082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3581/9173/files/99592991943.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_off00004f9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F9D 5240 bytes
SHA-256: a554dfe64986df62ae7f0355626dff64d69fa391dc208f8d5985c978cecdf8c2
font_01_sfnt_off0000618c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x618C 10732 bytes
SHA-256: 37389279a3c68cc2036a3b2a16cdacfa881c3f16a5ae1cf6b91816f569199acc

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