Malicious PDF — malware analysis report

Static analysis result for SHA-256 c91ca5f03207ca13…

MALICIOUS

PDF

46.1 KB Created: 2020-08-09 08:57:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53931fdbb596efe5ee564d93a5bc1530 SHA-1: 7cefc62a392b6ae1f47f6489e01859029a3bbbf5 SHA-256: c91ca5f03207ca1302ecf2c4b4652bb45f0dd0af89cc268fc1f40301f3a8c094
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with the primary link pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, suggesting an attempt to create a link farm or distribute malicious content through a large number of seemingly benign URLs. The presence of the malicious redirector URL strongly suggests the intent is to lead users to harmful sites.

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.ru/pify?keyword=spurious+correlations+pdf
    • http://doxuzume.forestburgbaptist.org/uploads/1/3/2/6/132681947/3096031.pdf
    • http://newow.kategrarock.com/uploads/1/3/0/7/130740517/9900213.pdf
    • http://files.lauriamusic.com/uploads/1/3/1/8/131857315/7329853.pdf
    • http://fobutopow.cedarspringschristianchurch.org/uploads/1/3/2/3/132303382/dccd4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/sopituwoxo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1918/1985/files/77896793389.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5080/files/lgebra_de_lie.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/39479444182.pdf
    • https://cdn.shopify.com/s/files/1/0436/1512/5662/files/albert_camus_the_stranger.pdf
    • https://cdn.shopify.com/s/files/1/0435/4339/6506/files/gowabigodegexa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3599/0936/files/ejercicios_frutas_y_verduras_en_ingles.pdf
    • https://cdn.shopify.com/s/files/1/0434/6085/3912/files/zoxozolurutinezusedemeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/nirusud.pdf
    • https://cdn.shopify.com/s/files/1/0431/5208/1053/files/dalapesadaxafivokopegenut.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_off00006093.bin
6d56553774bfaa696a48c9ec440cbf200d6805b3c16add8751dff6e8773ba602		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6093 5252 bytes
font_01_sfnt_off0000727f.bin
416186c1dc5eae00e6ff739b4dfa3bd77a3c960fd505aad229c5ef866c7f4a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x727F 10488 bytes
font_02_sfnt_off0000969c.bin
249651805b0a8f5b4743f17da7e3943b18be49f9c75a96c0f18a2f62b87e55bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x969C 16084 bytes

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