Malicious PDF — malware analysis report

Static analysis result for SHA-256 1dcd74bb62a7a189…

MALICIOUS

PDF

39.0 KB Created: 2020-08-21 21:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ad1da28e81f81ceebdfaa2238bdc7f8 SHA-1: 4232e6741b72b850f14e380d4e2c1ee134af4890 SHA-256: 1dcd74bb62a7a189ff9cc18c0b84dbf864786e17ff1601b6143211e8cbe35c85
140 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, which is likely used to deliver a malicious payload or redirect to a phishing site. The document body, though heavily obfuscated, contains references to 'Tumblr ios 7' and a URL that aligns with the malicious redirector. The presence of a large number of external PDF links suggests a link farm or SEO manipulation tactic to distribute the malicious content.

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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/pify?keyword=tumblr+ios+7
    • http://files.craftybrown.com/uploads/1/3/2/6/132680986/zagaburivi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3569/5016/files/biblio_scientifique.pdf
    • https://cdn.shopify.com/s/files/1/0430/6495/0945/files/68413878721.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/15624228848.pdf
    • https://cdn.shopify.com/s/files/1/0431/6689/2191/files/wopapolino.pdf
    • https://cdn.shopify.com/s/files/1/0433/1801/8216/files/28516292422.pdf
    • https://cdn.shopify.com/s/files/1/0438/2857/6416/files/mavoxuganulajexakagadakez.pdf
    • https://cdn.shopify.com/s/files/1/0438/1540/3682/files/35274805739.pdf
    • https://cdn.shopify.com/s/files/1/0431/2412/9952/files/xowanegabufavoxaruwap.pdf
    • https://cdn.shopify.com/s/files/1/0437/4783/6065/files/el_absentismo_laboral.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000052bf.bin
8868791708800f9003866ae6b34b846e6698ca3a04fb8d770c7422da1fa0f129		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52BF 4792 bytes
font_01_sfnt_off000062f1.bin
bafcfd1afab53a3f4678d1246fd71a846553f840a222806fad580a24350d2e76		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62F1 1892 bytes
font_02_sfnt_off00006c0f.bin
25418805642f89fb2cbb4179a04f790e71249e7fc2812ae8c91e603d2adefa5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0F 10456 bytes

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