Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0afcbd2da4c8a5a…

MALICIOUS

PDF

61.0 KB Created: 2020-09-02 02:01:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d4ce8c754ec37f75ea5e239244bf239 SHA-1: 52eb5455a033ba47aa7c5f15b808a440f29f1e0b SHA-256: d0afcbd2da4c8a5afaa7cd7e397841db09f1d864c4f2f0c6b1a8d1b8bfa99adf
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document body itself is heavily obfuscated but contains the URL that leads to a purported free download of Balsamiq mockups. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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=balsamiq+mockups+free++mac
    • https://static.usrfiles.com/ugd/7598fa_fa26555215e448b08c68b59756b06c15.pdf
    • https://static.usrfiles.com/ugd/ee9d3f_de49b29ed8e54aefbdc2d80cb0b7c1e3.pdf
    • https://static.usrfiles.com/ugd/4dd980_f4fdc4dc8ca649a3af891f99d927be2d.pdf
    • https://static.usrfiles.com/ugd/f84671_e1137c66fcd8421a95ef8712d497beb0.pdf
    • https://static.usrfiles.com/ugd/f3ecbe_97bd36b5fe9e46f4afdbe539a368d7b0.pdf
    • https://static.usrfiles.com/ugd/374ce0_23da2cd7b5d940299e7eeed5ab65994e.pdf
    • https://static.usrfiles.com/ugd/24deb6_414fd0a7209340a4a0d4e0eb82ee062f.pdf
    • https://static.usrfiles.com/ugd/90423f_6b4956e2ad894e629054d381108c5b4b.pdf
    • https://static.usrfiles.com/ugd/99a8f2_cd903cf0af8e43569187c1e3264bc9d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_33e1cc63d4504eafa87113d5abcd29bb.pdf
    • https://static.usrfiles.com/ugd/c068f8_b5a9cbd2896749deb299591e99b2a1b4.pdf
    • https://static.usrfiles.com/ugd/108936_25544667004042e3a0ffb4a73282aef8.pdf
    • https://static.usrfiles.com/ugd/5ea691_49bd724aa1f5410a803eccbaa36e072a.pdf
    • https://static.usrfiles.com/ugd/b8c837_0cf667b027d048ed83fedcfa84e3f7d2.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000682b.bin
2c6fbc3d6a3492d8cbf1fd2cde30c55241d113e9469e1ddb97f9c9b9121994bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x682B 5400 bytes
font_01_sfnt_off00007a7f.bin
2752d4bc50c456c89aa90edc95fbff43eb198f88295b3159a8a70909ebec7f11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7F 20572 bytes
font_02_sfnt_off00009942.bin
7d1d8f4167c36277c8fe71225fbdc31aaaca98204796b18c2f8b3e083a802a80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9942 2048 bytes
font_03_sfnt_off0000a219.bin
572d496eeba5197a8ddb6d623cc3ea776617e6469b055e098ee5f7555b87e83e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA219 2456 bytes
font_04_sfnt_off0000acb1.bin
b059b786013e41e695c1c9b9da3e8bd6ac8befce3b32f118284b492c84cb3638		 pdf-font-stream PDF embedded font (sfnt) at offset 0xACB1 10524 bytes
font_05_sfnt_off0000d0b1.bin
dd9a388fcb144a6ba51f93f71b1b5f80273f5f386ed315a2c4249d443452b30b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B1 16144 bytes

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