Malicious PDF — malware analysis report

Static analysis result for SHA-256 d054d2567e2553b0…

MALICIOUS

PDF

38.5 KB Created: 2020-08-03 17:30:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7ff485cf87d959f853987f1786ba16c SHA-1: 3e0b4a02d1c6d407e87aede6ab3228c39ed58645 SHA-256: d054d2567e2553b01b5042dc65109fa2e7187bd3af1078acb081d9f2a86bcfff
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links, https://ttraff.ru/pify?keyword=ssrs+report+blank+page+pdf, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'ssrs report blank page pdf' and the malicious URL, suggesting a lure to a malicious site disguised as a report. The ML classifier strongly supports the malicious nature of this PDF.

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=ssrs+report+blank+page+pdf
    • http://files.skyezentzmusic.com/uploads/1/3/1/4/131409508/4804667.pdf
    • http://files.talesfromamisfit.com/uploads/1/3/1/8/131856200/feperoxumejif-gemepato.pdf
    • http://files.onceuponamemory.com.au/uploads/1/3/1/3/131398088/sumixobedinisukada.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/82922124685.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/gurisomunowiwew.pdf
    • https://cdn.shopify.com/s/files/1/0430/1121/1425/files/92858163188.pdf
    • https://cdn.shopify.com/s/files/1/0429/8565/2375/files/2007_scion_tc_owners_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/4614/2114/files/pafemulixixojizosamawav.pdf
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/87124479145.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/27656442376.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/52135332303.pdf
    • https://cdn.shopify.com/s/files/1/0434/2749/6087/files/85110692306.pdf
    • https://cdn.shopify.com/s/files/1/0440/2449/6286/files/8282196696.pdf
    • https://cdn.shopify.com/s/files/1/0440/2964/0854/files/xiwesorufepuvu.pdf
    • https://cdn.shopify.com/s/files/1/0428/4186/6403/files/2533290274.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_off000057d2.bin
3fa4aa984fc35f491d1b6f83c5ef9b17978ea8c34957e698877988e42d921b00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 5516 bytes
font_01_sfnt_off00006a99.bin
6fa4f3a4ef08a1398742760b5fa0d42e875009a82a20c82817e75269088a5e24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A99 10212 bytes

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