Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f53c6078efdbf5f…

MALICIOUS

PDF

59.8 KB Created: 2020-08-01 07:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c75c25b65337147f4405926db911deb SHA-1: dfbe0075ef0367483e3256388f80614bd491f912 SHA-256: 5f53c6078efdbf5fa54c4c0988189547105e1bb7d676b7498876047aa72fd91b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirector links and an SEO link farm, suggesting a phishing or scam attempt. The embedded URL https://ttraff.ru/wb?keyword=nadirsyah%20hosen%20pdf is identified as a malicious redirector. The document body, though heavily obfuscated, contains this same URL, reinforcing its role in the 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.ru/wb?keyword=nadirsyah%20hosen%20pdf In PDF document text
    • http://files.vonderhauswulfgermanshepherd.com/uploads/1/3/2/6/132682295/67400.pdfIn PDF document text
    • http://files.lukejohnsonart.com/uploads/1/3/1/4/131408204/3092589.pdfIn PDF document text
    • http://files.rhinoultimate.com/uploads/1/3/1/3/131380292/8292001.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/1/0433/0687/7080/files/vuwotowomezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8176/7848/files/tapiwivavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vunumegosuvuvorewufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vojinanekarab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5554/6517/files/gijumuwetimixujefipida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8875/4328/files/lupurug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/lemisaduneg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8606/1480/files/98585488830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0922/0501/files/51309119899.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2558/8639/files/xenunuz.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_off0000ac92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC92 5168 bytes
SHA-256: 0eabafbc237d7ea9a58c6066161c33912c5c434b4ef779fb0c441bd66c9fd589
font_01_sfnt_off0000be2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE2E 10576 bytes
SHA-256: 39c86df3a89169f53fc89780748935ac129f7b7fe74d645d56ff32585253695c

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