Malicious PDF — malware analysis report

Static analysis result for SHA-256 caef9ae2b5b5c0bf…

MALICIOUS

PDF

46.0 KB Created: 2020-09-01 06:05:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb42de6fba6b9f907de0bb91066b6876 SHA-1: cbde877762268df3aa8c4bd3997eb9307ca6d930 SHA-256: caef9ae2b5b5c0bff1d3ec94d0b25c0dd171af9d3304e37ee43933a8c47acf52
128 Risk Score

Malware Insights

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

The PDF contains a mass external link farm and a critical heuristic firing indicates a malicious redirector link. The document body, though heavily obfuscated, contains text referencing a 'microsoft word 2010 business letter template' and a URL that aligns with the malicious redirector. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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/wix?keyword=microsoft+word+2010+business+letter+template
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/96928607493.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/45974677112.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/79286916990.pdf
    • https://static.usrfiles.com/ugd/158fb9_0b8b3d8d33c1438ca1c18df97eb8aa21.pdf
    • https://static.usrfiles.com/ugd/b8c837_912440e77ed84e83bf6efcd6eb7d9f54.pdf
    • https://static.usrfiles.com/ugd/16a96a_de9b283fab324518a4421f2f9d1101ba.pdf
    • https://static.usrfiles.com/ugd/c1108c_10f590ad95e64fbea493a57c9751fd1b.pdf
    • https://static.usrfiles.com/ugd/b7306e_9937fa5447074a738f6cab815fc465f7.pdf
    • https://static.usrfiles.com/ugd/f55bec_822d0d0c73cb45bfb6c229634fcfc929.pdf
    • https://static.usrfiles.com/ugd/599f1c_12f5f3791fab47598bb5720a24df558f.pdf
    • https://static.usrfiles.com/ugd/cafc24_ec17ab2651944999978e519b96d98fce.pdf
    • https://static.usrfiles.com/ugd/0d2908_f4b354b0085849e8adbf610bc2135cc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_20cc7e4667424dc59be3dfd229417251.pdf
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/50047600772.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8863/files/degonaxosezutedubir.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/microsoft_document_immaging.pdf
    • https://cdn.shopify.com/s/files/1/0438/2221/9421/files/falciform_ligament_of_liver_explanation.pdf
    • https://cdn.shopify.com/s/files/1/0431/4978/7285/files/midamipaza.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_off00006690.bin
b69ae879945ad4b4c5a50f80c7294abb79835f24ede5868212e7790e3d4f3c90
pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 5744 bytes
font_01_sfnt_off00007a0f.bin
2cf136a9920a2447171ac8280aafdd15c47e50abc15aeafb6e0e58350be3973d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A0F 10064 bytes
font_02_sfnt_off00009c6a.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6A 4324 bytes