Malicious PDF — malware analysis report

Static analysis result for SHA-256 b40005472eb2f758…

MALICIOUS

PDF

76.1 KB Created: 2020-08-23 21:48:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ac9e023a4916fcc94ad102eb8161049 SHA-1: 7092b6bb1f33e3dad54ae7c8f7105958bc3541e7 SHA-256: b40005472eb2f75846f07f78cb7b900b6f987b74b37bb5d03d9b09db581b589b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains multiple embedded links, with one prominently pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL. This suggests the primary goal is to redirect the user to malicious infrastructure, likely for further exploitation or credential harvesting. The presence of a link farm heuristic further supports the malicious intent of distributing links.

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=adding+subtracting+multiplying+polynomials+worksheet+doc
    • http://files.joseluisperezjim.com/uploads/1/3/1/3/131383553/gejuxab.pdf
    • https://cdn.shopify.com/s/files/1/0433/6621/9941/files/69596121029.pdf
    • https://cdn.shopify.com/s/files/1/0434/9342/5316/files/buresisepolituz.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6473/7433/files/mogefavoruge.pdf
    • https://cdn.shopify.com/s/files/1/0432/8269/4312/files/31588958721.pdf
    • https://cdn.shopify.com/s/files/1/0433/1490/5256/files/anna_karenina_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/92161478626.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/31520359504.pdf
    • https://cdn.shopify.com/s/files/1/0439/2311/2104/files/wuduketufogote.pdf
    • https://cdn.shopify.com/s/files/1/0438/6557/1493/files/wutuzodot.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/lojuparasijatozire.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/gaguwibiwepaj.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2381/files/6443024595.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dadimutixiwukigojubiw

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e08a.bin
85b692c1c636aed9ab1240d2a7361179fdd6c0849396a06064984f922e967b4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE08A 2828 bytes
font_01_sfnt_off0000ea84.bin
8ed03c11732338f03e483d0d24d985217644989a5b7e454f0526486ad889d635		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 5876 bytes
font_02_sfnt_off0000fe64.bin
c9543b7ae969e36b9118dc472c598a25d72b8bbe645c1df117ca8ab0118dc940		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE64 9896 bytes

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