Malicious PDF — malware analysis report

Static analysis result for SHA-256 b511fc02a31207f4…

MALICIOUS

PDF

54.8 KB Created: 2020-08-31 03:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e656860f05e115a1442689728378d17 SHA-1: 91fd8a3d43c11245761eb4639d7cc533b9681b5b SHA-256: b511fc02a31207f42b0eae199350043ac1c6b55f6163af7d5a95ca00d8ecab13
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous links, many of which point to a redirector infrastructure known for distributing malicious content. The document body and heuristics indicate a lure related to game layouts, likely a phishing attempt to drive traffic to malicious sites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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=forge+of+empires+best+layout In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/57c819_e4c9009dddc644bdae394ef697736eb2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9cfd0a_f4837e00d29a47db977507050448dfdb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d00699e14d084271a2a4c8d3ad75c5f0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_269a0ae271c24819a837d7c986639da6.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6a3c6d57076f463d98f0857f0535287a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_533cfa0e4d914056b47d1a2c05eff92a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/91e123_8169c5190054475285b097d07b52888d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/41f880_48404026774f421fafad5e3ca2f67a9e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_55766d608c5141be8a9b6785fb8ad384.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ae20bc9037eb4992bae742c27a233fe3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/guitar_hero_mobile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/nepitip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/98033314794.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e4ff69_d834fdc42ee841fa94a359d73b542a4c.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4b7290_4ae6e1d7214d46d5b2cf8d1fedc0f9a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/d4da64_7c547654b2cb4e0890e3defc5cafb2df.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_597443141cdd4dd08befe21a0b7ad014.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8305 5420 bytes
SHA-256: 7b71e20fb6ca32e9be8f07eddf9d79aaa1db3296ea1ec74d6020fb51737e8d1a
font_01_sfnt_off00009568.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9568 10120 bytes
SHA-256: 2ede619f259e79c2fba9627936dbe1a307f483b9242fe089106027f929dc1fd7
font_02_sfnt_off0000b820.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB820 16312 bytes
SHA-256: bf8f9ece8d9d74ce2d7a98a07ee1bb8f4056faf702b3b1702118181e85f1b939

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