Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c1e57ec49618c8…

MALICIOUS

PDF

41.3 KB Created: 2020-08-30 10:10:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 915b23073ba703bce934de67436a5ec0 SHA-1: 408cda783efd5730bc3663bd8bdf962e9f244f80 SHA-256: 45c1e57ec49618c8c5d8fdcc7c10d14ee7b2fe5ecba2c5a50c08c459ef9cf496
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing indicating a PDF link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text related to a 'reloj casio f-91w manual de instrucc' and the primary malicious URL. This suggests a social engineering lure designed to redirect users to malicious 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=reloj+casio+f-91w+manual+de+instrucc
    • https://static.usrfiles.com/ugd/e3ff21_4058c7ecbfe44e71a56fa09caa78c9e5.pdf
    • https://static.usrfiles.com/ugd/b8c837_bc25def020a549a4badb8957350bcc05.pdf
    • https://static.usrfiles.com/ugd/2486b5_78b132f71f994af7b3a271095bfa7417.pdf
    • https://static.usrfiles.com/ugd/8b97dd_3c2a8f8c5b5840d6a1fe98eddeb21b1f.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/84173409123.pdf
    • https://cdn.shopify.com/s/files/1/0440/2970/6390/files/ohio_state_football_schedule_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/19000983746.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/formule_pour_calculer_l_ge_gestationnel.pdf
    • https://cdn.shopify.com/s/files/1/0431/6938/2568/files/bokuwiboso.pdf
    • https://cdn.shopify.com/s/files/1/0428/5261/4311/files/pakese.pdf
    • https://cdn.shopify.com/s/files/1/0437/6847/9893/files/jarozul.pdf
    • https://cdn.shopify.com/s/files/1/0431/8576/6561/files/71945867116.pdf
    • https://cdn.shopify.com/s/files/1/0429/6628/6490/files/mikaboridovukim.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_off00006294.bin
9df9aece4b2847f1290f59dbdcc39c307e8d46fbb863b78a50b6b7da537122b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6294 5580 bytes
font_01_sfnt_off00007597.bin
1150054c9c0f524c617d579c95b7bee7ea5d1cf894e2a11474df1a4fb5decbf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7597 10372 bytes

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