Malicious PDF — malware analysis report

Static analysis result for SHA-256 56f5e35052de12a0…

MALICIOUS

PDF

40.5 KB Created: 2020-08-26 02:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a2b0cc46b8725bfa2c9f863e79c465d1 SHA-1: 15e25280651380cb159eaa7b4026c07a83342d57 SHA-256: 56f5e35052de12a0ea66d95b6e612a1dd7907c4f2ac27976e1ab3a323ba4b236
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, with one specifically identified as a malicious redirector. This suggests the document is designed to lead the user to a malicious website. The ML classifier also strongly indicated maliciousness. No scripts were extracted, limiting the analysis of direct payload execution.

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.com/pify?keyword=sistemas+abiertos+termodinamica
    • http://files.discoveryelectricbikes.com/uploads/1/3/2/7/132710661/bekixifawidikojod.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/96965687511.pdf
    • https://cdn.shopify.com/s/files/1/0435/7246/1727/files/kezoxonototowozek.pdf
    • https://cdn.shopify.com/s/files/1/0462/3283/0106/files/ramadan_calendar_2018_dubai.pdf
    • https://cdn.shopify.com/s/files/1/0439/4500/1115/files/kingroot_4._0_apk.pdf
    • https://cdn.shopify.com/s/files/1/0434/9018/1286/files/99318335982.pdf
    • https://cdn.shopify.com/s/files/1/0429/1703/6198/files/fifuwesizazadogino.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/nazexagozuwoji.pdf
    • https://cdn.shopify.com/s/files/1/0436/9462/0837/files/zitemofonoxizuboj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/29529942485.pdf
    • https://cdn.shopify.com/s/files/1/0429/6504/1311/files/wawigukaxibuvawi.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/atlas_copco_air_compressor_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/9684/2142/files/342050344.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_off00005fae.bin
6120788c38fca5cc25624534a991bd473e547c632a39b96f7deff649e3adadd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAE 5296 bytes
font_01_sfnt_off00007181.bin
3c187e50e4331e445f1f0a7a4a435005cc006a773e4f643f4c8c005d303a8175		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7181 10628 bytes

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