Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8bb65cf67d33371…

MALICIOUS

PDF

70.4 KB Created: 2020-09-01 04:07:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb951ccf5d30eb11b4850a42d1ee9f86 SHA-1: 275fd4eab2c3ea7f5e4639d7d457eb666d85b375 SHA-256: a8bb65cf67d333716fb7a7b6b8eb807576f6b651e5601aa3c153614ec0e005aa
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one identified as a malicious redirector. The presence of a 'download button' heuristic and the embedded URL strongly suggest a phishing or social engineering attack. The document body, though heavily obfuscated, contains the malicious URL, indicating an attempt to trick the user into visiting a harmful site.

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=jurnal+ketogenesis+pdf
    • https://cdn.shopify.com/s/files/1/0435/4460/8932/files/80577309287.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1616/files/34137022603.pdf
    • https://cdn.shopify.com/s/files/1/0429/3538/6265/files/cl_blends_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0438/8651/0232/files/5988833981.pdf
    • https://cdn.shopify.com/s/files/1/0430/0197/0837/files/21408107228.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/12410546401.pdf
    • https://cdn.shopify.com/s/files/1/0432/8092/4840/files/97891555078.pdf
    • https://cdn.shopify.com/s/files/1/0432/1234/1416/files/golipokepasujo.pdf
    • https://static.usrfiles.com/ugd/73f3b0_3bcea674e47a4831aaf7f787ee993212.pdf
    • https://static.usrfiles.com/ugd/b8c837_d08a0134108a41e787762ba4e8b11739.pdf
    • https://static.usrfiles.com/ugd/b8c837_6e2371964395401bb83f4d9dd4b47014.pdf
    • https://static.usrfiles.com/ugd/3aee12_3405d3bf1e4e4501a0e3aae76570f058.pdf
    • https://static.usrfiles.com/ugd/c6ac46_46549ec144d84fe0a6e6f5e74d5590f2.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_off0000d7a2.bin
692a374900f1c9f1575ea631fd2c267997da9de27a447484ea3ba1150f0ad6a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A2 5260 bytes
font_01_sfnt_off0000e99d.bin
cbef2abe3a18c723c09c804c4a1d034bf1f17ee3ee5366ddab987b4d4ea6fae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 10228 bytes

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