Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06456534e995ddf…

MALICIOUS

PDF

56.7 KB Created: 2020-08-19 12:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 008543d07b0c2daa43be59e5da440ec3 SHA-1: 096346118413aa73f9798666035ec61ccd5e0160 SHA-256: f06456534e995ddfcc36b58f51f04c83a95f1da417f3ebbab663cf4296df0b05
150 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of the primary links, https://ttraff.ru/pify?keyword=formule+chimique+in+english, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure through a link farm, likely for further exploitation or phishing. The ML classifier also strongly indicated maliciousness.

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=formule+chimique+in+english
    • http://files.odbijelihandela.com/uploads/1/3/0/9/130969238/7593318.pdf
    • http://files.greaterhomeofsc.com/uploads/1/3/0/7/130739831/84d02d4ac86a41e.pdf
    • http://files.excelpowerusercourse.com/uploads/1/3/1/3/131383204/mokenoxuzevusone.pdf
    • http://files.artsstudentsassociation.org/uploads/1/3/0/7/130739456/9143667.pdf
    • http://files.spabotanicatrading.com/uploads/1/3/1/6/131606839/duzijitut-wenutuja-pefalujajamirit.pdf
    • https://cdn.shopify.com/s/files/1/0437/1791/8875/files/mathematics_project_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52665001447.pdf
    • https://cdn.shopify.com/s/files/1/0434/2310/5175/files/schedule_maker_excel_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/0849/8591/files/77783130385.pdf
    • https://cdn.shopify.com/s/files/1/0448/4674/3709/files/dirufubetuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0165/1105/files/adobe_early_termination_fee.pdf
    • https://cdn.shopify.com/s/files/1/0433/9177/8965/files/70932823181.pdf
    • https://cdn.shopify.com/s/files/1/0429/9328/7331/files/2049492336.pdf
    • https://cdn.shopify.com/s/files/1/0429/6753/1673/files/brailyn_marquez_scouting_report.pdf
    • https://cdn.shopify.com/s/files/1/0433/4452/7511/files/99895401282.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_off000091e5.bin
d3d85cf1ce4ab4e60af4c0d94041768791104b03f966a1bb476c362cc364804b
pdf-font-stream PDF embedded font (sfnt) at offset 0x91E5 4888 bytes
font_01_sfnt_off0000a24f.bin
4242187d85c1be31e33494098d680479a1db75913176fed3129dd2cb9e761055
pdf-font-stream PDF embedded font (sfnt) at offset 0xA24F 10804 bytes
font_02_sfnt_off0000c72a.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xC72A 4324 bytes