Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f20784b1e72b534…

MALICIOUS

PDF

51.4 KB Created: 2020-08-01 04:19:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5c5305ed23401b0416eddae92337abd6 SHA-1: 217ce917e02ace5c7a37f8413c8efe5459a5ce45 SHA-256: 1f20784b1e72b53410d229929641a8445f1dd0fa1ecd7192622e558259cc2fc1
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=how+to+delete+rows+in+google+sheets', is identified as a malicious redirector. The document body, though heavily obfuscated, appears to contain the same lure text as the malicious URL, suggesting an attempt to disguise malicious activity under a common search query. No scripts were extracted from this sample.

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=how+to+delete+rows+in+google+sheets
    • http://files.shizokukaratedo.com/uploads/1/3/1/6/131606984/jutojefovusisivopep.pdf
    • http://files.dwp.co.il/uploads/1/3/1/0/131070588/3393756.pdf
    • http://files.sophiebehal.com/uploads/1/3/0/7/130740464/97873ee4434e96b.pdf
    • http://files.rorylocke.com/uploads/1/3/0/8/130874585/vitazoxamewemosolamu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3564/6357/files/32237798599.pdf
    • https://cdn.shopify.com/s/files/1/0437/6503/9261/files/zibulomunawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/93801619416.pdf
    • https://cdn.shopify.com/s/files/1/0427/4978/8327/files/69484893707.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/kafuwaneriwiwudi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/roniroximutegowabezuxotap.pdf
    • https://cdn.shopify.com/s/files/1/0427/8734/0454/files/belanasa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3412/3160/files/23414413417.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vitalifurefafimeribedewo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/xejowifenubuxujoxuxes.pdf
    • https://cdn.shopify.com/s/files/1/0428/7424/1187/files/89864615284.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006387.bin
5b93aa0f1627e42bf7805a0ab675728ecbde2836995d9427a0f59deaf238a1e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6387 4716 bytes
font_01_sfnt_off0000738a.bin
24695a071c9638a88e426846efd276c7fb955ff5ae53783b83fd5f73cf8f8102		 pdf-font-stream PDF embedded font (sfnt) at offset 0x738A 12852 bytes
font_02_sfnt_off00009d10.bin
f6e0f4a25f18a144688c6b7f40519a5efc98c72643b9054f89526e396d9b459d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D10 16144 bytes
font_03_sfnt_off0000b211.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB211 4324 bytes

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