Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c79959a59b797c…

MALICIOUS

PDF

100.8 KB Created: 2020-08-31 13:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 618c51b5537fe2ffc1dff8a76c51ecde SHA-1: 10c7b60bf9a3b3c7dd88e73570d6ca1984ad6b47 SHA-256: b1c79959a59b797cf8728a7e85ec52fe5898539985f6cc57cff11b9c084281e0
128 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/pify?keyword=java+jdk+1.+7+free++64+bit'. This URL is presented as a download for 'java jdk 1.7 free 64 bit', indicating a social engineering lure. The document also contains a low-signal heuristic for a visual download button, reinforcing the deceptive nature of the PDF. The presence of a link farm further suggests malicious intent to distribute content or redirect users.

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.ru/pify?keyword=java+jdk+1.+7+free++64+bit
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/puwitedewanizilakutiv.pdf
    • https://cdn.shopify.com/s/files/1/0446/7677/6089/files/juduzibutibil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/11293049847.pdf
    • https://cdn.shopify.com/s/files/1/0435/2340/8032/files/borub.pdf
    • https://cdn.shopify.com/s/files/1/0428/6713/0534/files/44803269897.pdf
    • https://cdn.shopify.com/s/files/1/0431/4077/6090/files/25036036575.pdf
    • https://static.usrfiles.com/ugd/e4a001_471de907b05c4a278ad6440ed7e263a3.pdf
    • https://static.usrfiles.com/ugd/affb4a_17479f409df740afa271f6ff1cf09458.pdf
    • https://cdn.shopify.com/s/files/1/0436/6322/9078/files/92381281342.pdf
    • https://cdn.shopify.com/s/files/1/0461/7633/8073/files/gatewususawulij.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_off000146b0.bin
d6fb35000a08c2eec3c9b87c4f34d30832294e79dd35d65be35a26ca15d708f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146B0 5424 bytes
font_01_sfnt_off0001595f.bin
c6337646bb418d735b64efa2b61c3b9445aee7b75739baf23cb7954499b3117c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1595F 14104 bytes

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