Malicious PDF — malware analysis report

Static analysis result for SHA-256 783df32bc854c3d0…

MALICIOUS

PDF

32.2 KB Created: 2020-09-01 04:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 85a55977459e1971fda087c26fda9dd7 SHA-1: ae44156792649a0fee25f7dfdf093b1210c8f4e9 SHA-256: 783df32bc854c3d0ac0b6f21d47ef01df118dc3c23d9fcb29d03abbdaeaada1d
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, pointing to 'https://ttraff.cc/wix?keyword=makeup+logo+vector+free'. It also contains a PDF link farm heuristic, indicating a large number of external links, many of which are to Shopify domains. The document body, though heavily obfuscated, contains the same malicious redirector URL and several benign-looking PDF links, suggesting a lure to download free resources which ultimately leads to malicious infrastructure. No scripts were extracted from this sample.

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=makeup+logo+vector+free
    • https://cdn.shopify.com/s/files/1/0441/0903/7720/files/becoming_supernatural_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/8105/6935/files/technical_analysis_explained_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0460/6518/9019/files/66614859072.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0435/5201/4491/files/vetagekuruketajizopav.pdf
    • https://static.usrfiles.com/ugd/cf79db_2c3588be3a87449f8221d0932217a20f.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c728487809e40508c7fd270a153ec65.pdf
    • https://static.usrfiles.com/ugd/b8c837_2144100e9be34a09ba9a82ea531e3fca.pdf
    • https://static.usrfiles.com/ugd/2e79a6_ad1b7d8d88a14c1cbf724fc7a1c02208.pdf
    • https://static.usrfiles.com/ugd/bb13a2_932e52fe01474b22a04b3f441867ddfb.pdf
    • https://static.usrfiles.com/ugd/9e53d4_f9771864b623408db8c5f5ea65e6090c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce05cf86db0144eb851017ae7d83654a.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_off000042de.bin
7279f1980d9274d35fb201e02d5994e02fd6b95ea9779a12923d2573482bea69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42DE 5132 bytes
font_01_sfnt_off00005486.bin
5a32cea15d4f2a9236b20493022a315bcac818c132e48e62c6824f97e8a5feb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5486 9360 bytes

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