Malicious PDF — malware analysis report

Static analysis result for SHA-256 644552076c23f30c…

MALICIOUS

PDF

356.5 KB Created: 2020-09-02 00:23:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20976b024edbac1624d2c809e60de13d SHA-1: 808eddb48b1acf45013751a3de90fd146fd3b8d6 SHA-256: 644552076c23f30cb892a3643af139636016dfc06e2b99db5894a063e5db3dc7
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the malicious redirector strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 3

  • 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.
  • 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.ru/wix?keyword=bc+livestock+market+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/8505505994.pdf
    • https://cdn.shopify.com/s/files/1/0434/2022/1607/files/67895418003.pdf
    • https://cdn.shopify.com/s/files/1/0448/5254/3649/files/the_molecular_biology_of_meiosis_in_plants.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/50993528164.pdf
    • https://cdn.shopify.com/s/files/1/0439/3651/4216/files/valipifuvususukum.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/vaganemewigoluzinipusesas.pdf
    • https://static.usrfiles.com/ugd/314c35_e6081f6a47674035af4d9ac88c75f792.pdf
    • https://static.usrfiles.com/ugd/c068f8_d6ae49c0b37247dfabf2063a99826e4b.pdf
    • https://cdn.shopify.com/s/files/1/0429/5757/0207/files/win_tv_guide_launceston_tasmania.pdf
    • https://cdn.shopify.com/s/files/1/0438/1127/4914/files/pdf_file_unlock_trick.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054094.bin
3471333e97544db0b18f2740a1bb3257076edf3b7d4d235727764f6749dfe860		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54094 5252 bytes
font_01_sfnt_off00055263.bin
acb25475ad613d0cafce52085df94f32f22f908ad1f4f668051dc01a71a553cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55263 15972 bytes

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