Malicious PDF — malware analysis report

Static analysis result for SHA-256 7556371155584bb4…

MALICIOUS

PDF

66.1 KB Created: 2020-08-11 16:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 731065e6064b4ff2e92c46511ba9dd1d SHA-1: 6e924ced896b5782502d2b2b4e249c96a8d75446 SHA-256: 7556371155584bb45a3ba7d09c3fcca8114614a5d78b2a44d61a1de4d0ec1f59
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to a redirector service (ttraff.com). This indicates an attempt to direct users to malicious content, likely for phishing or malware distribution. 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.com/pify?keyword=makalah+askep+retinoblastoma+pdf In PDF document text
    • http://fuselav.kalbproject.com/uploads/1/3/2/6/132681482/buwikevabuxipi.pdfIn PDF document text
    • http://zufomiguz.gavaresse.fr/uploads/1/3/0/7/130739678/natif-mibifivitamujo-webuvelaxa.pdfIn PDF document text
    • http://files.lttn.com/uploads/1/3/0/8/130873877/1674187.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/1/0429/9125/5713/files/99075234409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9025/4749/files/20103640353.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0225/6795/files/dasozalixobazixo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1725/6605/files/kosanawugof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9059/9319/files/22224327434.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1221/1359/files/86529067820.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/nalajenoderemomepofelefa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1424/8857/files/3974814465.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5274/4356/files/effective_advertising_techniques.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2125/files/anlage_av_2020_formular.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0019/1387/files/chemistry_and_pharmacology_of_anticancer_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lewajoranuputefikilos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3624/5144/files/6502400958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0229/8521/files/kuginesukaguselexu.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 4

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_off0000c651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC651 5488 bytes
SHA-256: 3b5803246c0f2ea36b67af872a56cfa1caa790f9da86e8418ea267fa2c734781
font_01_sfnt_off0000d8c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C7 10208 bytes
SHA-256: 63012189a3cecbfad749b5d975aa3667f55a7cbff903a274e618516034148bf8

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