Malicious PDF — malware analysis report

Static analysis result for SHA-256 90236b8ca3602d75…

MALICIOUS

PDF

47.8 KB Created: 2020-08-09 15:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a80da37fb346108d41b4be59097b6511 SHA-1: e5ec74ae8ebd47d8ba3bfb657ee8a4947f17f4f8 SHA-256: 90236b8ca3602d7598f69732c48ad5b31bcf81670585bda4e6cfb07bd687deeb
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many of which lead to a redirector service (ttraff.ru). This suggests a link farm or redirection tactic to obscure the ultimate destination of the malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous external links points towards a delivery mechanism for further malicious activity.

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.ru/pify?keyword=pluralisme+adalah+pdf
    • http://vekonerok.fankahou.com/uploads/1/3/0/8/130814328/wagigajed.pdf
    • http://files.cjtendermeat.com/uploads/1/3/2/3/132302833/2777838.pdf
    • http://dijevo.2binspireddesign.com/uploads/1/3/1/0/131069934/f97a1e05b5.pdf
    • http://tunidom.softutor.com/uploads/1/3/1/0/131071164/fofeso_vezexer_pomem_xorawijata.pdf
    • https://cdn.shopify.com/s/files/1/0432/8574/1724/files/new_york_islanders_schedule.pdf
    • https://cdn.shopify.com/s/files/1/0434/1714/1415/files/printable_business_card_template.pdf
    • https://cdn.shopify.com/s/files/1/0427/9740/0223/files/69927890014.pdf
    • https://cdn.shopify.com/s/files/1/0431/2177/0656/files/54677168950.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/durable_power_of_attorney_colorado.pdf
    • https://cdn.shopify.com/s/files/1/0433/6638/3768/files/94403036568.pdf
    • https://cdn.shopify.com/s/files/1/0432/6821/0852/files/5_agents_of_socialization.pdf
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/44221226087.pdf
    • https://cdn.shopify.com/s/files/1/0427/7141/5196/files/70032695233.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/53384870480.pdf
    • https://cdn.shopify.com/s/files/1/0435/1374/1472/files/migotokox.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/gogexovasijemenezar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9272/9246/files/dimamuxobibumokukoloxito.pdf
    • https://cdn.shopify.com/s/files/1/0434/2376/0536/files/pimoxogetiru.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_off00007170.bin
d08ef3b1b946dea1b49a1d13c396090060f8426666fb1bbc8719fcca383c5df7
pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 4868 bytes
font_01_sfnt_off000081e6.bin
52a19a13e781886444202f0671b5a076f25dce198a3549573e76931119db9e78
pdf-font-stream PDF embedded font (sfnt) at offset 0x81E6 9928 bytes
font_02_sfnt_off0000a3e6.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA3E6 4324 bytes