Malicious PDF — malware analysis report

Static analysis result for SHA-256 b215d45ce559c973…

MALICIOUS

PDF

45.7 KB Created: 2020-08-31 16:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 50e2418dab5a3f591d7cebb0ee4586d7 SHA-1: d0bf38de2d3ef45eaaf447f418a32c3c8c793675 SHA-256: b215d45ce559c9739183a3e106e73af6f8c7c7a6d693c247695b2013c06eb3a9
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that matches the suspicious redirector. The presence of numerous links to external PDFs suggests a link farm or redirection attempt to a malicious site.

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.cc/wix?keyword=anrede+formeller+brief+englisch 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/e3834b_2529bb7855624ce58880b4413c629e25.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/65b209_f409c1711300410f9f231cf35229454e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/95089d_83a12ac4a744436099e5717b6e2aed54.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/59022585862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/0817/4743/files/systemic_pathology_book.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_78f4b7a22861481391ec0b6becef8965.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ca300b_2c7b408978344b55881c112aa0f6fe69.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3f80ec_5980bbf007304362931843815c0fd766.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ab72e_aa5c315918a647a48bd60c53c0b8b7b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_17210462a724451698488763164e7bf8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/ab63e3_a24eb26254d54934bfdbdda7c7422759.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4bb894_8aadcd3daf6f4041ac286da776c50ae0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/576447_761fff3d4e3f48f7b243f105dd22aa23.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 2

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_off00005e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E17 5356 bytes
SHA-256: a885d2711f64622c49c1958ff85877be63f4e30c482bab90be1fd9a601eba958
font_01_sfnt_off0000702d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x702D 11280 bytes
SHA-256: 82904bc9158204c812f924c75f35b46be566eb0d3e73001212be72141a37bf3e
font_02_sfnt_off00009556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9556 16084 bytes
SHA-256: 018fe7ab8f823a3cb090921c1c485b4b19f8bb00c3f2c8bff27a3b653d2cb391

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