Malicious PDF — malware analysis report

Static analysis result for SHA-256 909ed784905c00a5…

MALICIOUS

PDF

50.5 KB Created: 2020-09-01 21:46:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: aa3c2537e8ca85f60eb0db99d1b0d250 SHA-1: e75a3bd323071729e5fb42e55e6bfdd0889d5f6d SHA-256: 909ed784905c00a5e57199cf5f9c6f71e12b4b5b9862e36556eff59d3b706750
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to a redirector URL (ttraff.cc) known for malicious activity. The document body, though heavily obfuscated, includes the same redirector URL and a seemingly benign PDF link, suggesting a lure to a malicious site. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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=baptism+of+fire+guide+kingdom+come 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/b8c837_4a8e8b88ce3f42ecaa4fc7149577fd9a.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2e736227da9c45b5bb0b3c9fcb3d05c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b0cd75_57c44851a89e4f40a60a301a63726364.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/1c90dc_e8cd6ecef7cb41e4a470dc7c07d7c95d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b4609a_539ebed569fa4603a3cf42677f4441a4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/804ff6_4b0e7e73fb244332ab53d550f79c0f99.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/67e251_015e2832afca4a37a8afaafed9fa8f4e.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/cc03df_37d8c5e083ca4e44b7a232d51df1bb5d.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9e14ca_22b389b555a74e868dadf13d66a29bf8.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_cbefe847cd8746febe31c723a7bbdeb0.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/353d00_809cdb62bdc942d6a84ea6075e921c4b.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/3649d2_b3bff3902f5b4188bb514d95e35c2a41.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/2e79a6_46c900d722a2463787492d35be71f398.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e5cbe5_237b7134ee134a4da2bb2465b3b640ed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9381/files/lego_city_my_city_2_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/mufowixupijusenekowomopir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9900/5863/files/gst_books_for_ca_final.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92AB 5556 bytes
SHA-256: 194da9de02b5bc11c40cbd873f222ee031cc0ba91dc719db893c939d4ed5a98f
font_01_sfnt_off0000a586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA586 10192 bytes
SHA-256: 42fb0e809094d46ff4da301daecdf2c9c70a6bd0ea2a4908aae85b9c1e5a42dc

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