Malicious PDF — malware analysis report

Static analysis result for SHA-256 b829a1518e8a46b9…

MALICIOUS

PDF

45.7 KB Created: 2020-09-09 20:42:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 556d3dac2f6ee9cb2cb636bb983a20d9 SHA-1: 3ca01976bc67dc2710417e0d64d2bfff7f5b9c87 SHA-256: b829a1518e8a46b9b601037a9a85d28a39db3a974afefc26972312b677e37e00
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=ashok+samrat+movie+song+free', which is flagged as a critical malicious redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for phishing or malware distribution. The presence of numerous other PDF links, many hosted on shopify.com, indicates a link farm or SEO poisoning tactic to obscure the malicious destination.

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=ashok+samrat+movie+song+free
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/28777750519.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/o_mio_babbino_caro_piano.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0584/files/36628027061.pdf
    • https://cdn.shopify.com/s/files/1/0433/1254/5950/files/after_dark_screensaver_windows_7.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5881/files/kupilinizubekubugivab.pdf
    • https://static.usrfiles.com/ugd/2d1648_dbcd23caa6c84f0fb6371e3adff33a0a.pdf
    • https://static.usrfiles.com/ugd/11f207_1c1c634023434ccd8fe21c85ca5d229c.pdf
    • https://static.usrfiles.com/ugd/b81754_65e1671c0bb04ce8ad67ba8b51b5b192.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/zadevabomaxoxanatagexes.pdf
    • https://cdn.shopify.com/s/files/1/0431/4995/1138/files/boletin_informativo_estructura.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/66393454924.pdf
    • https://static.usrfiles.com/ugd/35e1ce_561f848bf11e4d28be08bf3e9c79cddd.pdf
    • https://static.usrfiles.com/ugd/956c05_a29d806f85c2470198a4d64877a5b013.pdf
    • https://static.usrfiles.com/ugd/d5d855_454b7c9d11694ea2a0822d5b70528698.pdf
    • https://static.usrfiles.com/ugd/83e584_755c0f1da69a4eb9b5fdc0a0f2b46e9c.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_off0000657d.bin
d7824b36ca2244b465875dbea4f95a145146c427a5ed12e228c28062f3c2082d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x657D 5260 bytes
font_01_sfnt_off00007747.bin
0372b83df765b0f1f939ee36ef0c9ef7038c9ff8fe46fa255657d926c82811a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7747 15752 bytes

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