Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d9cfe009d7c87c4…

MALICIOUS

PDF

76.8 KB Created: 2020-08-24 14:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fded1128730486f5fe977eb7b53fb69f SHA-1: fa595f63fc2dd32ea8f17ac51c1ae903b0e6215f SHA-256: 1d9cfe009d7c87c41974f3d9733d16ad31bca5817a2f3fe10bee49e5b3fabaf9
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised with a movie title to entice clicks. The PDF also hosts a large number of external links, many pointing to Shopify, suggesting a link farm or content distribution strategy. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary malicious activity appears to be the redirection to a harmful URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/pify?keyword=power+rangers+movie+in+tamil++2017
    • http://files.eleanor-e-books.net/uploads/1/3/2/7/132740637/tasuneromuwaf.pdf
    • http://tisezu.kathrynbelle.com/uploads/1/3/2/6/132682646/xadetofino-vekukolilari-veduburomowibuf.pdf
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/fluorescence_spectroscopy.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/tuxolununuduxoxe.pdf
    • https://cdn.shopify.com/s/files/1/0438/9689/7704/files/fizegedereluvalisawumonul.pdf
    • https://cdn.shopify.com/s/files/1/0431/2032/8864/files/40636419286.pdf
    • https://cdn.shopify.com/s/files/1/0435/6482/6773/files/xuminixefapeviwikujiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0848/2710/files/bidefuvebugikozezatavezi.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/bonafide_letter_format_for_qatar_embassy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44603331863.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7448/files/nba_2k_13_xbox_360.pdf
    • https://cdn.shopify.com/s/files/1/0434/4256/9383/files/arte_barocca_riassunto.pdf
    • https://cdn.shopify.com/s/files/1/0431/2144/2977/files/3973309360.pdf
    • https://cdn.shopify.com/s/files/1/0462/4849/3205/files/best_hillsong_worship_songs.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/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e37a.bin
a0025999532c4c61011a00bf442e1b7cc62f59d872adf69ca82e99de4a9ba9eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE37A 5564 bytes
font_01_sfnt_off0000f66b.bin
9ac488501cf383c9bdea4e9ab2b538d4abf353152eaac64f25895925cc38087a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF66B 1896 bytes
font_02_sfnt_off0000ff83.bin
d988cf58be096d3ff4e198a3fa293c724c817a1dfcdeb55db7b0d865b79e07d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF83 11316 bytes

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