Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b1f13110f30b5ec…

MALICIOUS

PDF

46.4 KB Created: 2020-09-02 01:01:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a35bce0345b1b8ed0d6b0d214d96c13 SHA-1: 5a3ef80d2b9d81dffb1cca3bdef78e4c813defe2 SHA-256: 1b1f13110f30b5ec4f5e3726b824040e914322d4d98ea35aa26b967ce7ecb6c7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a significant number of embedded links, identified as a link farm. One of these links, 'https://ttraff.cc/pify?keyword=auto+format+code+in+vscode', points to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to contain text related to code formatting and the authoring application, suggesting a lure to entice users to click the malicious link.

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/pify?keyword=auto+format+code+in+vscode In 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/1/0439/1780/3675/files/matuxexunewela.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7757/3535/files/jokubidivosadivatavujum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1278/4277/files/31629897358.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/9534/6590/files/alimentos_para_diabetes_tipo_2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/787b0a_f36ad5a0818242d7b5ebf981110b9d0b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b58d21_afb3ce6eb16646d9aafef514b2908e9b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/74a852_ca15a5e5f5a540e7a3f4fcd93ee1b5fd.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/fd3290_07a4f2d1601342b2b8a6caa2024abd43.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6f58fb_599b594c84c24c7ea7f809c8e8e129d9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/merovelasigizivegiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3346/8839/files/vuduxuletoxakop.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 1

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_off00005a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A96 5184 bytes
SHA-256: 47e22614599f1d722f0eec0d8ad97e40a54fb2f43a8ebb88eaccd8bb3e14b935
font_01_sfnt_off00006c29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C29 14764 bytes
SHA-256: 0702a78200414b9c018f0b2dc12b0c00165f34d5d2c2540a351648dfca0f72c4
font_02_sfnt_off00009671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9671 16524 bytes
SHA-256: 6746e5238264c3f7206b45ffeae26f3f10e7188f386a9109fed608d3c0b2c909

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