Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc4b970b59e0b8f…

MALICIOUS

PDF

41.5 KB Created: 2020-08-09 16:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8c7f04caacd53e8b8e7c4aeaee4677e4 SHA-1: 65bf4d8e33aa373a0cb730735994b2100da60441 SHA-256: edc4b970b59e0b8f144c352933c9a1f3599792252908233d0c060bde6f1422c9
120 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.cc/pify?keyword=beethoven+sonata+10+pdf'. Additionally, it exhibits characteristics of a PDF SEO link farm, with numerous embedded links to external PDFs, many hosted on Shopify. The document body, though heavily obfuscated, contains the same redirector URL. This suggests the primary intent is to redirect users to malicious content, likely for phishing or malware delivery.

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.cc/pify?keyword=beethoven+sonata+10+pdf
    • http://files.bobbylewislmt.com/uploads/1/3/1/1/131164506/lepozowivulipu-piraribozivel-kalesogep-beligoriz.pdf
    • http://todeg.pawsitivepupdogtraining.com/uploads/1/3/1/4/131437987/nelusixik-kunux-putetakoxap-mikalefok.pdf
    • http://povanopup.tahoportfolio.com/uploads/1/3/1/3/131398140/483e779e85361.pdf
    • https://cdn.shopify.com/s/files/1/0440/3275/3829/files/40112132830.pdf
    • https://cdn.shopify.com/s/files/1/0432/7751/6955/files/36821393908.pdf
    • https://cdn.shopify.com/s/files/1/0428/1643/8438/files/webamuvosiruma.pdf
    • https://cdn.shopify.com/s/files/1/0428/0143/0695/files/zevopuworit.pdf
    • https://cdn.shopify.com/s/files/1/0435/5814/2120/files/jovizubimuvofipesutuligub.pdf
    • https://cdn.shopify.com/s/files/1/0436/9452/2523/files/zamutizasitovabudozatafu.pdf
    • https://cdn.shopify.com/s/files/1/0451/2625/4745/files/livestock_management_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/4102/1334/files/95983455049.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/59072325123.pdf
    • https://cdn.shopify.com/s/files/1/0440/6837/2632/files/ad_d_keep_on_the_borderlands.pdf
    • https://cdn.shopify.com/s/files/1/0431/7446/1594/files/alopecia_universal_en_nios.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/rozeb.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006483.bin
7c32c1d3d20cd793d5af4cc565084515c2ec118bc1ce174b917f81e0106fb14c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 5304 bytes
font_01_sfnt_off000076a3.bin
c44289406c57d7670305176ec36443c26b02be0b06e70286d3e5d0b1107a3ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76A3 10120 bytes

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