Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c6f38b750354fd3…

MALICIOUS

PDF

43.1 KB Created: 2020-09-01 05:16:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 643d25e5c9a4e263ec9d6273972003fe SHA-1: fda223e191ec49ad24f3b15e39b57db7d39bab70 SHA-256: 4c6f38b750354fd381658fa2eb2c02e2d2ef5c099e2be28d735dd8c26413ad67
120 Risk Score

Malware Insights

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

The PDF file contains a mass external link farm, with one prominent link directing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Instagram free for windows' and the malicious URL, suggesting a social engineering lure to trick users into clicking the link. The primary goal appears to be redirecting the user 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.cc/wix?keyword=instagram++free+for+windows
    • https://static.usrfiles.com/ugd/912de2_5ce7acb0683944dfa37d2d1fd2cb8598.pdf
    • https://static.usrfiles.com/ugd/269bb8_8eddd1e6a2f3450eac6e07a5062c0fc0.pdf
    • https://static.usrfiles.com/ugd/b8c837_2de0a9dc2c264526926d7851542ac9a4.pdf
    • https://static.usrfiles.com/ugd/df4650_ceac3d37e43d48a7a53e35f259c5ced2.pdf
    • https://static.usrfiles.com/ugd/0a593f_4ae262465f204916a33d6666bb8b3d7a.pdf
    • https://static.usrfiles.com/ugd/d902bb_4c99f2751cd1434fb7d74d59deace2da.pdf
    • https://static.usrfiles.com/ugd/299074_aa7222988dc249ef8edba21a64a30310.pdf
    • https://static.usrfiles.com/ugd/b8c837_184b8fb892aa49e5bf07b8003eeaf816.pdf
    • https://cdn.shopify.com/s/files/1/0437/1510/0840/files/53660858239.pdf
    • https://cdn.shopify.com/s/files/1/0431/4834/5500/files/potib.pdf
    • https://cdn.shopify.com/s/files/1/0437/1392/1175/files/rival_ice_cream_maker_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/gifilosemelezelogo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/pigigutibi.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_off00006a96.bin
04dd1e75506a28b95b82b50022d661b792452f7c45ec982ccf8084d67e7179eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A96 5224 bytes
font_01_sfnt_off00007c5d.bin
9d67515d96f8f073d6e9ebc6a8a4c3d93de32247ad9ba5fcbf4878e13edaf003		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5D 10364 bytes

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