Malicious PDF — malware analysis report

Static analysis result for SHA-256 401154be44354b80…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 09:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d8de97e3f556817ec638dc86a0f5124 SHA-1: 37cde27c5b08d0d31419d25db267dce61feffafd SHA-256: 401154be44354b80d5974cf453dd09e65a0613958e8f1d846384f8b08853766e
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to malicious infrastructure. Additionally, PDF_SEO_LINK_FARM suggests a link farm, with the primary malicious URL being ttraff.ru. The presence of a 'download button' heuristic further supports the lure. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a manual download, likely leading to a second-stage payload.

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.ru/wix?keyword=baofeng+bf-888s+manual+portugues
    • https://static.usrfiles.com/ugd/0a0016_449d3f6184844ae09ed68dcbd7bb21dd.pdf
    • https://static.usrfiles.com/ugd/b8c837_fd95d354f52045b6937cb42309b17429.pdf
    • https://static.usrfiles.com/ugd/77d535_8851ee2a7f1f4242a2e32db51bdd7536.pdf
    • https://cdn.shopify.com/s/files/1/0460/1557/8279/files/zutolulufovu.pdf
    • https://cdn.shopify.com/s/files/1/0427/8275/2935/files/49858815955.pdf
    • https://cdn.shopify.com/s/files/1/0433/1687/1333/files/26560823449.pdf
    • https://static.usrfiles.com/ugd/b8c837_19264833cbd04ddc9aec8a20a8d52c93.pdf
    • https://static.usrfiles.com/ugd/b8c837_6bcb1f5a65bf4a72a1e90f841602bdbd.pdf
    • https://static.usrfiles.com/ugd/b8c837_b123b9d35bee43a28bac04eb065e97d7.pdf
    • https://static.usrfiles.com/ugd/105a8c_45f193613a064ab08f4d833e9ff02bc4.pdf
    • https://static.usrfiles.com/ugd/96768c_8d42fb5751ad42fdb8452909229fe3dd.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_off00005f6f.bin
15bc283a6574b81394cd9a97b8e56fb4eb4253ee010c3af6441b1b6485cc8a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6F 5636 bytes
font_01_sfnt_off0000728c.bin
134aed931ec1e7511379c12132898ce18cc0cfb3380a1c6f02830ed4130a1368		 pdf-font-stream PDF embedded font (sfnt) at offset 0x728C 10200 bytes

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