Malicious PDF — malware analysis report

Static analysis result for SHA-256 d277a6b3c696ad86…

MALICIOUS

PDF

38.9 KB Created: 2020-08-22 06:07:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 048f563484963bb78ef0d695d570bc27 SHA-1: 429ad75df4822a3262d404e34b6400cd7abaf0bb SHA-256: d277a6b3c696ad86cacf0e05a19a6cc0d4f39e68fc68aa373d4de9341b218940
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same redirector URL. The presence of a link farm and a high ML classifier score further indicate malicious intent, likely for phishing or malware delivery.

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=browser+android+terbaik+ringan In PDF document text
    • http://xafajol.isabelsherk.com/uploads/1/3/1/3/131379730/7126304.pdfIn PDF document text
    • http://files.hartshillandharpfieldsra.org/uploads/1/3/2/6/132682899/mofetopo.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/1/0438/6983/1323/files/charity_foundation_wordpress_theme_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3257/1044/files/arcsoft_showbiz_3._5_user_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0088/7456/files/8637268052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5196/4830/files/kigejowosuvaxinanowob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9499/0231/files/zutolug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6292/7253/files/tenonakifopipipeludox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/sunulituzotuxezikoge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/84053718748.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1081/7180/files/precalculus_fifth_edition.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 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_off000059ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59AE 5308 bytes
SHA-256: 91172453fcf72b3a48875eeddc98e4251ebb54eb3ff12eeca57e409c74cb06e3
font_01_sfnt_off00006bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 10576 bytes
SHA-256: ebddc1a8f1bd24e3adbd604dd2a0b6ad031fad86e38e190915133cd6705198a3

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