Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c1fcd3d4f5f4536…

MALICIOUS

PDF

40.0 KB Created: 2020-08-03 01:21:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9c0b5d855654401cc17515954f4c4051 SHA-1: b7f3cb5ab6e00ab8de7373eb2653096a40781ad2 SHA-256: 1c1fcd3d4f5f4536f833fd0ade681aa78a6bad336fa368ce256c1b0149b5d9eb
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, many pointing to Shopify domains hosting other PDFs, and one critical link to a known malicious redirector. The document body is heavily obfuscated but contains the string 'https://ttraff.ru/pify?keyword=microsoft+space+simulator', indicating a lure to a malicious site. The presence of a malicious redirector and a link farm suggests an attempt to drive traffic to potentially harmful content.

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=microsoft+space+simulator
    • http://files.lesboisbands.com/uploads/1/3/1/4/131437210/beputip.pdf
    • http://files.mcvickardesign.com/uploads/1/3/0/7/130775784/5811235.pdf
    • http://files.losalamitosunit716.org/uploads/1/3/2/6/132683135/pigaxuvamilesat.pdf
    • https://cdn.shopify.com/s/files/1/0434/9440/8352/files/92528707093.pdf
    • https://cdn.shopify.com/s/files/1/0427/7737/8972/files/38658691890.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/femepotufitaxaturu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/35543542817.pdf
    • https://cdn.shopify.com/s/files/1/0433/0677/8784/files/pevawaviwaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/sword_of_the_meek_combo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6280/files/key_and_peele_nfl_names.pdf
    • https://cdn.shopify.com/s/files/1/0434/0944/0935/files/nuzemogatobisewenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/32029007332.pdf
    • https://cdn.shopify.com/s/files/1/0437/0461/5066/files/43171192350.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_off00005f8f.bin
249ddf141c402efc9c63798735c821d51470815c69731f95324e87a5c528350b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F8F 5168 bytes
font_01_sfnt_off0000711a.bin
4278702d8584f291679467104e2dc67d7d0095e675420e537a73ee22bd38d356		 pdf-font-stream PDF embedded font (sfnt) at offset 0x711A 10048 bytes

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