Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0c04e1d081fa59f…

MALICIOUS

PDF

65.3 KB Created: 2020-09-01 03:15:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a1c9868772be5414f0292c52d9b1fdd6 SHA-1: 41cfe25e33fea4e38db989f8fd894a8f90c646a4 SHA-256: f0c04e1d081fa59f025465bc0637a930d157046b70dada9fc57e43caec793237
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/wix?keyword=inelastic+neutron+scattering+pdf'. This indicates the document's primary purpose is to redirect users to a potentially harmful site. The presence of a large number of external PDF links, many hosted on Shopify, further supports a link farm or SEO poisoning tactic to distribute malicious content. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • 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.
  • 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=inelastic+neutron+scattering+pdf
    • https://cdn.shopify.com/s/files/1/0436/7355/1001/files/14970662225.pdf
    • https://cdn.shopify.com/s/files/1/0429/9377/8837/files/rexamivopomuxemuxugenadu.pdf
    • https://cdn.shopify.com/s/files/1/0437/2529/1674/files/aromatherapy_books_free.pdf
    • https://cdn.shopify.com/s/files/1/0445/6431/6319/files/advanced_cardiac_life_support_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/1307/9203/files/47396293376.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/masker_innisfree_sheet_mask_untuk_jerawat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1815/6192/files/zubiginateb.pdf
    • https://cdn.shopify.com/s/files/1/0428/7247/1715/files/dupezukanalugabuz.pdf
    • https://cdn.shopify.com/s/files/1/0463/7389/6353/files/confidential_information_release_form_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/9121/3988/files/kodatexobinumifix.pdf
    • https://static.usrfiles.com/ugd/0dcf4b_c98c42443aa34a47ab6573bd2eda123c.pdf
    • https://static.usrfiles.com/ugd/e02969_40f8d526aed4446bac72e912a543dbb2.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/libro_de_periodoncia_carranza_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0436/6709/5705/files/buwizelute.pdf
    • https://cdn.shopify.com/s/files/1/0439/2858/4347/files/77213041428.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009134.bin
8e946ab76871b4001a8eb2020b863cc680b9804028e4ddcab6f6e8a2704c6764		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9134 2912 bytes
font_01_sfnt_off00009b97.bin
8c6f3399e38add20565d0a833598ba26969ffe0983b303a367d88f0fcdc90768		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B97 5144 bytes
font_02_sfnt_off0000ad15.bin
3e0640dad9114212f49a3ff21c7dc3bc96b4c731244b661a0c9dd5e2b3701a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD15 11588 bytes
font_03_sfnt_off0000d482.bin
49753f47dcc57c983fb4b222e20c62ee42016d1f1833236c7eae6758e0db8b65		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD482 16128 bytes
font_04_sfnt_off0000e972.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE972 4324 bytes

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