Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab8eeec397d9a95…

MALICIOUS

PDF

42.1 KB Created: 2020-08-29 18:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6472398a56a2a1d33dc3e72908df9a37 SHA-1: 529ae9a45b92e8964a185d49e740062f55c11749 SHA-256: fab8eeec397d9a95ed9148eec71d562f5d02b97bcc6e5a441c95db3631acfcc2
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a direct link to a known malicious redirector at ttraff.com. The document body text, while heavily corrupted, appears to be a lure related to 'silabas en espanol para imprimir'. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating the primary purpose is to direct users to potentially harmful external content.

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.com/wix?keyword=silabas+en+espanol+para+imprimir
    • https://static.usrfiles.com/ugd/b8c837_8ff460a1e14c4c8c9458a8e6829bc181.pdf
    • https://static.usrfiles.com/ugd/b8c837_0ad7be5c8a2d49129316fa4099f232aa.pdf
    • https://static.usrfiles.com/ugd/b8c837_aafbd17cb98245e3a07b59be7b774e56.pdf
    • https://static.usrfiles.com/ugd/b8c837_81745db88dcf41319b1575c6fd3f4e06.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d9449bcc04a4a73972dae8474ec9713.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdd1c61c72af4b8b9397ec9026c61704.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46150969179.pdf
    • https://cdn.shopify.com/s/files/1/0437/5193/2056/files/pdf_to_word_converter_online_free_no_email.pdf
    • https://cdn.shopify.com/s/files/1/0435/6987/3054/files/aircraft_structures_engineering_students.pdf
    • https://cdn.shopify.com/s/files/1/0430/9689/9733/files/68946052901.pdf
    • https://cdn.shopify.com/s/files/1/0431/9523/6509/files/vigomomaterukuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/42504928545.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/dead_anime_girl.pdf
    • https://cdn.shopify.com/s/files/1/0432/8924/7894/files/worusuj.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_off00006524.bin
7d9f734fc20385ffc63c03e2c3ab178d14f9fa87d0051147ef581df218d4c116		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6524 5208 bytes
font_01_sfnt_off000076ad.bin
a86ea0e25a53d43de3efa0e86600847900b27b09d9a233976e0ec565ed24bb93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 10948 bytes

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