Malicious PDF — malware analysis report

Static analysis result for SHA-256 18988ac6076af2b2…

MALICIOUS

PDF

105.1 KB Created: 2020-08-31 01:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 81294e4681aa9499fa1bcd407d307f27 SHA-1: 661a1a6f05cfa4d427a2adb2ef64bb180af3e06a SHA-256: 18988ac6076af2b2dec69a26cdd02f0ea1697a19c9a6aec681549fc84eb9d418
194 Risk Score

Malware Insights

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

The PDF contains numerous links to a redirector service, identified by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_UTM_REDIRECTOR_LINK heuristics. The ML classifier also strongly indicated maliciousness. The primary URL, https://ttraff.com/wix?keyword=%25D9%2585%25D8%25B9%25D9%2584%25D9%2588%25D9%2585%25D8%25A7%25D8%25AA+%25D8%25B3%25D9%2585%25D8%25A7%25D9%2586+%25D9%2583%25D8%25A7%25D9%2584%25D9%258A%25D9%2581%25D9%2588%25D8%25B1%25D9%2586%25D9%258A%25D8%25A7, is likely used for phishing or to serve a second-stage payload. No scripts were extracted, but the document structure itself facilitates the malicious redirection.

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.com/wix?keyword=%25D9%2585%25D8%25B9%25D9%2584%25D9%2588%25D9%2585%25D8%25A7%25D8%25AA+%25D8%25B3%25D9%2585%25D8%25A7%25D9%2586+%25D9%2583%25D8%25A7%25D9%2584%25D9%258A%25D9%2581%25D9%2588%25D8%25B1%25D9%2586%25D9%258A%25D8%25A7 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/1f2646_b2a570609dd0472192a18fde0efd81a4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_3cc702a799f440158ce52561a5081221.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4c1554_ef42177d432d4c3db051268926a00a93.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_2e736227da9c45b5bb0b3c9fcb3d05c2.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/e2f197_3bebd5abe1a147ab8c4bfbb40f0d80f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_ce2eb99890cb4ec88b7d458bb6da8de4.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/63022f_ae4dbe9ab9194198a7ba282010fd23fc.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_032545bc579f4844a2adcab88841ae67.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/68ec51_612fa3fb321a4efabf809a2259f88ae1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/47768963618.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5399/6442/files/conceito_de_abordagem_qualitativa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0835/8561/files/osha_30_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3828/3678/files/antrenmanlarla_matematik_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/9th_class_english_grammar_book_free_download.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_743a26bed5e847c9bbbd96eeb19aa4b5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/6da380_ff7477720d834534897ece3d8198ca0f.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015a56.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15A56 34016 bytes
SHA-256: 8c09650db78bc207c1fcb5d8a44daf92160f09ef93f86b6404639ba068033583
font_00_sfnt_off00010efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFD 4068 bytes
SHA-256: ca42d5ed38f04d35f6c6ef927e9c0e2abbbfec64d896d823d531a8752c72a089
font_01_sfnt_off00011cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDB 17804 bytes
SHA-256: 130811244e0738beac586ee7937da76d1d2be2f99bed100a342cd26bc11a1d34
font_02_sfnt_off000137e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137E7 9972 bytes
SHA-256: 4f290886eb35133d7e8b90c33a7fefc708e9b1f7184f9d169e6889c501d61031

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