Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40d6fe1fe029e74…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 17:27:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fee560e90a809b6a17e5b93bbf21a37 SHA-1: 76977dbd4ab187723d8201a067a38f59fe710286 SHA-256: b40d6fe1fe029e747b0c9fd591eea745a294c6852a9cd35aba26bdb03dfb19ee
120 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, embedding a large number of external links, with one identified as a malicious redirector. The primary malicious URL is https://ttraff.ru/wix?keyword=lipids+notes+pdf, which likely serves as the initial point of compromise. The document body contains garbled text, indicating it is not intended for human readability but rather to host these links.

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.ru/wix?keyword=lipids+notes+pdf
    • https://cdn.shopify.com/s/files/1/0429/9050/2051/files/rexurilujawuma.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/south_west_gauteng_college_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0461/3328/0921/files/hello_2019_tamil_movie_songs.pdf
    • https://cdn.shopify.com/s/files/1/0432/1712/5536/files/rigabakovosadakemomeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/9735/7472/files/pathfinder_pawns_bestiary_2_box.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/sezupa.pdf
    • https://cdn.shopify.com/s/files/1/0446/9538/8313/files/honda_trx_200.pdf
    • https://cdn.shopify.com/s/files/1/0430/0167/5939/files/california_dreamin_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/7810/4728/files/nyc_correctional_officer_exam.pdf
    • https://static.usrfiles.com/ugd/cc15ef_4bd4f69a8aa14df0a578b840dde058b9.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c0238f118ca4d269845d0bdfe52e7ee.pdf
    • https://static.usrfiles.com/ugd/0c41e7_31658e4e27bd406aa281d12576037046.pdf
    • https://static.usrfiles.com/ugd/67f5f7_6c80e2956b3e45258187bcc1c82cda72.pdf
    • https://static.usrfiles.com/ugd/0adedf_ac87d0107d454102a72411a657ca59bc.pdf
    • https://static.usrfiles.com/ugd/a6e5e9_7ab7f62381f04ea8893a38f7f11f65c1.pdf
    • https://static.usrfiles.com/ugd/9c0842_7aec3dfc46824fd1974a322418be0443.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_off00006311.bin
659b23df461efdd93ffe88ba12d62a2cce15d5ee1952857372d03a95796e427e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6311 4640 bytes
font_01_sfnt_off000072f9.bin
1f915978c835ab39e674469184870d9ececa99d7770f1851178d50dda898a47a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72F9 10236 bytes

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