Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8da7d34620e1fa8…

MALICIOUS

PDF

86.4 KB Created: 2020-09-09 00:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4aa0df54eb04af4c5d9ff5bf66165e9c SHA-1: 803ea4c543da8aeb2fc41d92ffe5a6e69f071bec SHA-256: e8da7d34620e1fa84f5463b72d512c0fbf59345976e5cd5593f77c58469bcefe
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to known malicious infrastructure. Additionally, a PDF_SEO_LINK_FARM heuristic suggests the document is part of a link farm, likely for SEO manipulation or to distribute malicious content. The embedded URL, 'https://ttraff.club/wix?keyword=sonic+all+stars+racing+transformed+free+apk', is the primary indicator of malicious intent, attempting to trick users into downloading a file under the guise of a game. The document body, though heavily obfuscated, contains this URL, reinforcing the phishing attempt.

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.club/wix?keyword=sonic+all+stars+racing+transformed+free+apk
    • https://cdn.shopify.com/s/files/1/0439/6436/7006/files/advanced_wireless_networks.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/38727726766.pdf
    • https://cdn.shopify.com/s/files/1/0434/6678/4932/files/computational_and_algorithmic_thinking.pdf
    • https://cdn.shopify.com/s/files/1/0434/5869/1232/files/11216962772.pdf
    • https://cdn.shopify.com/s/files/1/0437/8558/4797/files/yowhatsapp_new_version_apk_2019.pdf
    • https://static.usrfiles.com/ugd/dcf311_0c975e607aac495284b44eaa7c13bab8.pdf
    • https://static.usrfiles.com/ugd/fdee49_005c22ced4f34efb8af08f09727dec0e.pdf
    • https://static.usrfiles.com/ugd/50c35f_e3e81afa96354aec8545495d84338953.pdf
    • https://static.usrfiles.com/ugd/05900a_a3cf0896e15748bf9937470c8be6afa3.pdf
    • https://cdn.shopify.com/s/files/1/0437/6405/6225/files/sample_warning_letter_to_employee_fo.pdf
    • https://cdn.shopify.com/s/files/1/0447/8337/0397/files/zofaj.pdf
    • https://cdn.shopify.com/s/files/1/0431/7986/8320/files/12903108685.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 13

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_015_off00011be5.bin
2ab4ae7b3ccfaebe196c8b8cdfc2470837f5fbad1951901277d4ba2d8bc1d27e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11BE5 19044 bytes
font_00_sfnt_off00006ad4.bin
4fca73d47fa94a6ad668c0f4434483fdc2f54e6be5ae77a011c3735f5dfefd3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AD4 7916 bytes
font_01_sfnt_off00007f35.bin
de06d65b8639f4f4ca21d88138c375ca8134c9174746705bb18c7d2c91c8fcf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F35 4632 bytes
font_02_sfnt_off00008f6b.bin
9dc381cf0f3b797a57515b4a569d75de95ee837c48dfca3e0452e16244b1a87e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6B 5640 bytes
font_03_sfnt_off0000a291.bin
7073f777ec002e82a856420936458262fa3cc3b4ee0437ed56f01fa51c4379d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA291 4140 bytes
font_04_sfnt_off0000afaf.bin
2f58f42410b60611991c12283e964e03297a95500ca09b14f4d605296bc50bc4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFAF 3048 bytes
font_05_sfnt_off0000bbbe.bin
864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBBE 2328 bytes
font_06_sfnt_off0000c676.bin
0e4b190990c22158f359a0de2485c61736e93a484cfb226f63bccb9bc1da1b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC676 2604 bytes
font_07_sfnt_off0000d14e.bin
5b8e8035f8940535bfb5f3d78de7d5c45dbc51c905faa5d9788b8fc152e96872		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD14E 3840 bytes
font_08_sfnt_off0000df5c.bin
d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5C 2108 bytes
font_09_sfnt_off0000e92b.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE92B 1800 bytes
font_10_sfnt_off0000f1c2.bin
1c7c24c357d20ef21d1e2f3bda7ae8d97a8713d85405d47780c2fe5a3c4ab338		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C2 13116 bytes
font_12_sfnt_off00013baa.bin
ee8afa51e50492bdf4d25b6b01818d2021856a0eb5271b70f188e6d094f25891		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13BAA 2832 bytes

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