Malicious PDF — malware analysis report

Static analysis result for SHA-256 04950d7edfccae62…

MALICIOUS

PDF

51.4 KB Created: 2020-08-30 00:16:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7898002e14dae6ab9d0b3ace373c27b SHA-1: e7bba932048bdb7e535b5273c6de3eba33dfe408 SHA-256: 04950d7edfccae62b5b7ccc6defe8adab4fb63d83c293640f8ba0db9257c490d
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded links, with one identified as a known malicious redirector. The heuristic 'SE_INVOICE_LURE' suggests the document's content is designed to trick users into clicking these links, likely leading to a malicious site or further payload. The presence of a malicious redirector and a large number of external links indicates a phishing or redirection attempt.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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=tricap+st.+cloud+mn
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8841/2836/files/48721063286.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/gofusepozim.pdf
    • https://cdn.shopify.com/s/files/1/0429/3810/6023/files/albemarle_32_express_performance.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/league_of_legends_rengar_build.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34456372212.pdf
    • https://static.usrfiles.com/ugd/b8c837_132b69ffa7884215a1e977c4c89356e1.pdf
    • https://cdn.shopify.com/s/files/1/0431/4179/1900/files/deftones_covers_album.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/coordinate_plane_worksheets_7th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0434/6285/2761/files/92734174469.pdf
    • https://cdn.shopify.com/s/files/1/0436/5670/8254/files/90200368623.pdf
    • https://cdn.shopify.com/s/files/1/0429/7077/5706/files/36221727694.pdf
    • https://static.usrfiles.com/ugd/b8c837_a95941689db5425b9f4a0dd5103113fd.pdf
    • https://static.usrfiles.com/ugd/87fdc7_69ca148e211549639962c8df1e3a1c47.pdf
    • https://static.usrfiles.com/ugd/de3d83_f1dc479935a34144b4ce3de4aff18171.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_off00007e67.bin
1da882f0ebe223e0da694c3b9b22ce085e24b1740cf1cd538cff18b3a2208b7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E67 5200 bytes
font_01_sfnt_off00008ff6.bin
bfbbfdfa352a94219764276415a294c7c168baa5bf3a5c21896124cb774850e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF6 15684 bytes

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