Malicious PDF — malware analysis report

Static analysis result for SHA-256 af38af88d638eb9b…

MALICIOUS

PDF

39.4 KB Created: 2020-08-29 07:45:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8aae36e9888ccc202bb48bcf6f6cd51b SHA-1: b5786bb97f778e41c2d77e4cb0386af31c1d047e SHA-256: af38af88d638eb9b7447f85704f54cf3842af9c4713154168693e0c5776ffd3e
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, many of which point to PDF files hosted on Shopify. One of these links, https://ttraff.com/wix?keyword=mictasol+azul+como+se+toma, is identified as a known malicious redirector. This suggests a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated.

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=mictasol+azul+como+se+toma
    • https://cdn.shopify.com/s/files/1/0460/0692/7527/files/transformers_bumblebee_camaro_old.pdf
    • https://cdn.shopify.com/s/files/1/0434/5901/8919/files/eros_guide_orlando.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/58585016777.pdf
    • https://cdn.shopify.com/s/files/1/0429/9295/9642/files/toxuzatedusitisena.pdf
    • https://cdn.shopify.com/s/files/1/0429/9417/2058/files/29620544781.pdf
    • https://static.usrfiles.com/ugd/b8c837_c693a7209468469290000844a6107def.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jujirufevob.pdf
    • https://cdn.shopify.com/s/files/1/0431/2255/7082/files/makalah_bronkitis_akut.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98223768302.pdf
    • https://static.usrfiles.com/ugd/b8c837_0893b9117fc24951aa6f7b0ce4139260.pdf
    • https://static.usrfiles.com/ugd/b8c837_ecab16c08d664fa29fc513827eb3e27d.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_off00005ae4.bin
1302332948b7c23933f92f4d59139a8baafcdf0a1c8b8805039a964612d0a46b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE4 4904 bytes
font_01_sfnt_off00006b8b.bin
816d8b75c790731fd2bc2ef1e49e7a3ae01e1ce1a8d15b40704eded3bb9ffa89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8B 11404 bytes

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