Malicious PDF — malware analysis report

Static analysis result for SHA-256 d912a159701d2f31…

MALICIOUS

PDF

36.0 KB Created: 2020-09-07 00:53:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 64715ea9a4b195c803bdc2fd74c0d171 SHA-1: f8c33e6eb4a98bd5dc30c8c9672a8a812daa4c1d SHA-256: d912a159701d2f31b329a0b94dc32743dfe51459bc146a659e93ab2485df40cc
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a malicious redirector link, suggesting a phishing or malware distribution attempt. The document body, though partially corrupted, contains text related to 'handwriting worksheets letter k', which likely serves as a lure to encourage users to click the malicious link.

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.link/wix?keyword=handwriting+worksheets+letter+k
    • https://cdn.shopify.com/s/files/1/0435/1187/3688/files/14288398298.pdf
    • https://cdn.shopify.com/s/files/1/0440/7567/9896/files/83264819370.pdf
    • https://cdn.shopify.com/s/files/1/0437/6264/7189/files/99134622810.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/armando_hasudungan.pdf
    • https://cdn.shopify.com/s/files/1/0434/7458/3702/files/50737680671.pdf
    • https://cdn.shopify.com/s/files/1/0451/8985/7431/files/fortnitemares_challenges_part_1_guide.pdf
    • https://cdn.shopify.com/s/files/1/0437/8063/6821/files/asynchronous_binary_counter.pdf
    • https://static.usrfiles.com/ugd/838e7e_27c2752184464c2cb55db194fd609b38.pdf
    • https://static.usrfiles.com/ugd/e4ff69_9d0a2ef7b7e9410c89ad2eb8d7790dca.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/puwurawojomawegonope.pdf
    • https://cdn.shopify.com/s/files/1/0437/7218/2685/files/mega_man_x2_guide.pdf
    • https://cdn.shopify.com/s/files/1/0429/6055/2085/files/bimuxixulubutulimimeza.pdf
    • https://cdn.shopify.com/s/files/1/0429/7159/4911/files/75432839754.pdf
    • https://cdn.shopify.com/s/files/1/0435/3723/6119/files/40050198188.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_off00004d96.bin
1d5cbab6a3b2c5bcddb3b3812bbe72edce35d99956e2b07b4871a78828ef4db4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D96 5204 bytes
font_01_sfnt_off00005f56.bin
81eea21f339f09420c6ee4a424ce58a3603b90a6478aa66d4a82c82bb2f88abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F56 10948 bytes

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