Malicious PDF — malware analysis report

Static analysis result for SHA-256 3beaddf6f72b0725…

MALICIOUS

PDF

41.6 KB Created: 2020-08-21 14:06:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 988e131c28dff5ac50a162e97c225ec6 SHA-1: 4339009ef82341fc4df54933e136ff85a7dff0fc SHA-256: 3beaddf6f72b07259310fb9332ce8899a34002db81d5333065b00b7316f43b1c
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.cc'. This URL is presented within the document body, disguised as a download link for 'Candy Crush PC Windows XP', likely to trick users into clicking. The file also exhibits characteristics of a link farm, with numerous embedded links to other PDFs, many hosted on Shopify. The presence of a visual download button lure further supports the social engineering aspect of this attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=candy+crush++pc+windows+xp
    • http://files.beyondthebrainlearning.com/uploads/1/3/1/4/131407968/boburi.pdf
    • http://files.jlsnaps.com/uploads/1/3/2/6/132695629/a9f548b4.pdf
    • https://cdn.shopify.com/s/files/1/0431/8268/6367/files/3422939186.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/tazuraxukuxezisujerer.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/inheritance_book_2.pdf
    • https://cdn.shopify.com/s/files/1/0433/7342/8888/files/mixededezanugawufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wofazimaxax.pdf
    • https://cdn.shopify.com/s/files/1/0437/1962/2808/files/lufurow.pdf
    • https://cdn.shopify.com/s/files/1/0439/1400/2600/files/74046733933.pdf
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/98544869752.pdf
    • https://cdn.shopify.com/s/files/1/0440/3675/1525/files/78512385205.pdf
    • https://cdn.shopify.com/s/files/1/0429/8611/1137/files/bukaxukamebezabeku.pdf
    • https://cdn.shopify.com/s/files/1/0431/3025/7568/files/troy_bilt_2700_pressure_washer_manual.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_off000064f1.bin
c210d116fd3fa69834da2112f9c6b78c7c12bf460d9ada67edb8aa3b0eb82e77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64F1 5296 bytes
font_01_sfnt_off00007704.bin
f2736f7577cc59168a146b02ac31da57841a4a19fdf44e6dc195ba3ac402f8ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7704 10192 bytes

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