Malicious PDF — malware analysis report

Static analysis result for SHA-256 a881876ae9d559a5…

MALICIOUS

PDF

41.4 KB Created: 2020-08-11 05:02:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcd0c641392583cc2cf1281a0db40ab0 SHA-1: 33cddcc1b3afd4afad399989578e0d83281d8ec7 SHA-256: a881876ae9d559a5a647ab784f69dd1e4e5ddf8f0a651fa8e922bf1b4da36083
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'meditation for beginners pdf' and includes the malicious redirector URL, suggesting a lure for users seeking such content. The presence of numerous Shopify links, while many are benign, contributes to a link farm pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=meditation+for+beginners+pdf
    • http://files.communication-works.ca/uploads/1/3/0/7/130776245/pemeluna-rulokofawaz-gejuka.pdf
    • http://files.sbkherbals.com/uploads/1/3/1/3/131398010/fupugu.pdf
    • http://najiguj.christinewongphotography.com/uploads/1/3/1/4/131406149/ranelumawez.pdf
    • http://fufisasuk.redkora.com/uploads/1/3/1/4/131407089/9123867.pdf
    • https://cdn.shopify.com/s/files/1/0438/9994/5112/files/wurijirawumerezuviduno.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/5829457544.pdf
    • https://cdn.shopify.com/s/files/1/0437/6952/8471/files/1718362411.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/viwavuwopijixe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/98600106987.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2459/files/download_file_from_website_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/5183/5801/files/wipalatavife.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/88075317933.pdf
    • https://cdn.shopify.com/s/files/1/0435/3510/6203/files/24592191282.pdf
    • https://cdn.shopify.com/s/files/1/0429/7624/7967/files/netamomeziwipi.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_off00006437.bin
ede5b615c605e57aa8940d6d8f11978274f0178a63fa9426cb0254daec254acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6437 5324 bytes
font_01_sfnt_off00007666.bin
894b0c505d54e5e9096c4b19d50409322deb4350b607767736c878e198822dc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7666 10444 bytes

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