Malicious PDF — malware analysis report

Static analysis result for SHA-256 a990f9c5175ba836…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 15:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2c8330a299252c1bb716ff2ee789ca8a SHA-1: 409468170a19d8ab90eb346c3ae604ddc1a86354 SHA-256: a990f9c5175ba836cc223ef26d402b75b7e74c4ccaadab6556425fbba8e16940
194 Risk Score

Malware Insights

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

The PDF contains a link farm designed to redirect users to malicious infrastructure. The primary malicious URL identified is https://ttraff.cc/wix?keyword=android+network+on+main+thread+exception+asynctask, which is likely used to deliver a secondary payload. The document body, though obfuscated, contains references to this URL and other benign-looking PDF links, suggesting a social engineering tactic to trick users into clicking 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/wix?keyword=android+network+on+main+thread+exception+asynctask 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/76156b_c9e1e324360f441e91b1570c46347141.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0a052f_aab46eb6815a495ea889d03a220e932b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_f30c5b81840947059d01847d45cdc094.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_d8e8d6012ea549288043a7e5f2d85829.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1b8612_96fbdeec490c4742a6040d2b558ee1a1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/217d68_14ed1aa7ac9f4e64937a673b90bab772.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_6aecdae74ae14960af658b92618a68f8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/7ff653_f671420644e14a248ba7590185437315.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_8b57079a03574ee384b79c52a839f77f.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0466/7188/8549/files/jufapibajebobisijokeneda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2161/5783/files/68322223033.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 5

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_off00006b94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B94 5596 bytes
SHA-256: 59209561d33e4c9f4dd0c65a4d4cb9982f8e396b92282eb505a25561764fc2bb
font_01_sfnt_off00007e8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E8D 13124 bytes
SHA-256: 6f77082d0d761981868baeecbca41521737a25795069ec0a646b7f352abd88c4
font_02_sfnt_off0000a8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8EA 16088 bytes
SHA-256: f1368e0d82604bf55bb40b01ac61c381dd14042cff43d793d5e70c6199447dc1

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