Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc05e823f9dbcd71…

MALICIOUS

PDF

76.8 KB Created: 2020-08-13 18:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63c2dafb39a2117e4da19a46d7b56949 SHA-1: e9283ad71dc83aeb8ef9c3b095f7d8b78c222bb6 SHA-256: fc05e823f9dbcd71fb70319234a4b2de3403b1a5774b20595adaec643984847c
128 Risk Score

Malware Insights

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

The PDF file contains a lure for a free book download, which is a common social engineering tactic. It embeds a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The PDF also contains a large number of external links, many pointing to Shopify, suggesting a link farm for SEO manipulation or to obscure the malicious redirector. No scripts were extracted from this sample.

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.com/wb?keyword=reasoning%20book%20in%20telugu%20pdf%20free%20download
    • http://gukaju.zhangtours.com/uploads/1/3/0/7/130775701/1608915.pdf
    • http://gedilub.collieinspections.com/uploads/1/3/0/8/130814179/vufadudikedazawugiz.pdf
    • http://files.epicgeekshop.com/uploads/1/3/2/3/132303035/d5bb789.pdf
    • http://files.aromathymebistro.com/uploads/1/3/1/6/131637606/savefurizij.pdf
    • https://cdn.shopify.com/s/files/1/0432/5959/2859/files/27166293583.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kevaziretojigadogikoranab.pdf
    • https://cdn.shopify.com/s/files/1/0430/3273/9989/files/alumina_processing_properties_and_applications.pdf
    • https://cdn.shopify.com/s/files/1/0429/8027/8426/files/78353838068.pdf
    • https://cdn.shopify.com/s/files/1/0436/2004/0866/files/jepigolajejawug.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/hulu_error_code_p-_dev318.pdf
    • https://cdn.shopify.com/s/files/1/0428/0346/2303/files/41018940810.pdf
    • https://cdn.shopify.com/s/files/1/0431/4942/6839/files/70850998448.pdf
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/sigesagis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/degejuwetisagemudow.pdf
    • https://cdn.shopify.com/s/files/1/0431/5113/0785/files/tsi_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0435/1403/6376/files/46406024561.pdf
    • https://cdn.shopify.com/s/files/1/0439/3218/8840/files/turuxib.pdf
    • https://cdn.shopify.com/s/files/1/0452/4526/8128/files/human_body_systems_test.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c1b.bin
00447d86fdfa4dad87494b285a9f7b607258acc8b2f7b5436d573d498179cd9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C1B 5512 bytes
font_01_sfnt_off00008ef8.bin
6deb67c7bb47696d1e6482d576a040e78db75969fbba992072c83264501fb72c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF8 22040 bytes
font_02_sfnt_off0000c2c7.bin
16f1e771235d3f55a7df9997edb7c4ec6195a8e6f1296c62e781fd41d76aee8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C7 10876 bytes
font_03_sfnt_off0000e827.bin
39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE827 16092 bytes
font_04_sfnt_off0000fd2b.bin
17e8dfb5e98a93168878f924a89017c30314df76ad18ccc1f5ca79614685b912		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2B 12376 bytes

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