Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc736fc9606518c…

MALICIOUS

PDF

79.5 KB Created: 2020-08-06 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 863e3e850c6c87acff63d6c323c50ffc SHA-1: 9f2d7396234ad0236c5b78cae3ff1e386f52c055 SHA-256: 3dc736fc9606518c7693196d97c05678a7c8b20178dd14e48a95d0f5df19fbf2
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, indicating a link farm for SEO manipulation. One of the primary links, 'https://ttraff.cc/wb?keyword=hardware%20maintenance%20manual%20lenovo%20t410', is flagged as a malicious redirector. The document body, though partially corrupted, contains text related to a hardware maintenance manual, suggesting a lure to entice users to click the malicious link. No scripts were extracted from this sample.

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.cc/wb?keyword=hardware%20maintenance%20manual%20lenovo%20t410
    • http://files.excelbusinessintelligence.com/uploads/1/3/1/3/131380845/333d30d.pdf
    • http://files.brentcue.com/uploads/1/3/1/4/131482916/nosubozunisagosatuji.pdf
    • http://sinod.alienspacemonkeys.com/uploads/1/3/1/3/131381679/xobarupamidapob.pdf
    • http://files.elkfordcurling.ca/uploads/1/3/0/9/130969192/b98df.pdf
    • https://cdn.shopify.com/s/files/1/0431/1020/3556/files/lovubasumaguza.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/zawoz.pdf
    • https://cdn.shopify.com/s/files/1/0434/5053/2001/files/kinitojuve.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/77294633775.pdf
    • https://cdn.shopify.com/s/files/1/0428/2118/9788/files/nowamosonajabej.pdf
    • https://cdn.shopify.com/s/files/1/0440/7921/8840/files/56668702608.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/86140694809.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2636/files/lemozogi.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1945/files/natebiliwawutolug.pdf
    • https://cdn.shopify.com/s/files/1/0433/9869/3013/files/pyrolysis_gasification.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_off0000d84a.bin
fdcc5c0be73dca95ddc9d47fb6c61e85c8292fd9d0f266dde883b222e209af5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD84A 5300 bytes
font_01_sfnt_off0000ea5d.bin
ddbf740da0ef905bfa2dc042545f07d01728ef3f0e84c6095fee4c2659a55f43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA5D 15940 bytes
font_02_sfnt_off00011b89.bin
a23d6b0e1f044af2ecf8dc4372f224102370a4a94617cb3c5804d154822908ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B89 16080 bytes

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