Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b4f0e698b09bcf0…

MALICIOUS

PDF

44.4 KB Created: 2020-08-30 09:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c187d619fa5d09d7d9e148aed3fe4aa SHA-1: 800f055a8ebc43f9deb5f20d991376d2ab682490 SHA-256: 9b4f0e698b09bcf0f3542c97848965b6331140142d4412c774c5766da31c46f0
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 a link farm designed to manipulate search engine results. One of the primary links directs to a known malicious redirector at 'https://ttraff.ru/wix?keyword=ventajas+y+desventajas+de+dropbox'. This suggests the document's purpose is to drive traffic to malicious infrastructure, likely for further exploitation or phishing.

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/wix?keyword=ventajas+y+desventajas+de+dropbox
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/pdf_split_to_jpg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/94540700916.pdf
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/explication_de_texte_alain_propos.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_a1247f119d0942da9194f9b44cd679f5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0d32edc0fc4e42489320979af73155b9.pdf
    • https://static.usrfiles.com/ugd/d9d1f5_d1b2a23451894998a6d6f6f52b3b4517.pdf
    • https://static.usrfiles.com/ugd/b8c837_58663ce709c448bca39a3026dc301f13.pdf
    • https://static.usrfiles.com/ugd/dd4472_894898552b4945518e990942aa74ef7e.pdf
    • https://static.usrfiles.com/ugd/b8c837_675826b6c0e14a5c887689b8dad0a5f5.pdf
    • https://static.usrfiles.com/ugd/36f25b_a147a94fca944c86b5a8f9e03daccf46.pdf
    • https://static.usrfiles.com/ugd/b8c837_b30317aaa5564d66978070745cb83036.pdf
    • https://static.usrfiles.com/ugd/b8c837_b54901a16fa140ae866ad1d87633440b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ba607913a8904a358d37d38dc01a3227.pdf
    • https://static.usrfiles.com/ugd/b8c837_8a11080f724b4a2cb24dc0a40c4d53e4.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_off00005f6b.bin
aab9ccaffbf623e9fc869b80c8475a122c138909f9a52de74b7ef451eef2bb62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F6B 5072 bytes
font_01_sfnt_off000070c2.bin
56647dba992d6c4c2508108c2f9600249530a231c171ebe2da375cbde0b9f43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70C2 11224 bytes
font_02_sfnt_off0000954f.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x954F 4324 bytes

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