Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f7a210bdeddcbb3…

MALICIOUS

PDF

40.2 KB Created: 2020-08-11 01:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9368c5123c949999900a7cc4d6b3ca61 SHA-1: 58f0a20d34d73f405d29d0619f95329686826b94 SHA-256: 4f7a210bdeddcbb37f97a6f178f3449abe0b6f23f64739eb93484e8d97776d6a
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used for SEO link farms or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/wb?keyword=gestion%20de%20logistica%20internacional%20pdf. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking malicious links under the guise of relevant content.

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/wb?keyword=gestion%20de%20logistica%20internacional%20pdf
    • http://files.donnablifecoach.com/uploads/1/3/1/3/131381363/virepaguwez.pdf
    • http://files.theschoolofmakingthinking.com/uploads/1/3/0/9/130969334/3702415.pdf
    • http://files.ims-spi.com/uploads/1/3/0/7/130739340/2262785.pdf
    • http://files.heatherseagraves.com/uploads/1/3/2/3/132302774/nufigidoruz-reverime-mojavo.pdf
    • https://cdn.shopify.com/s/files/1/0428/4196/4710/files/kukolevegixovuxosilifunem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/base_in_terminal.pdf
    • https://cdn.shopify.com/s/files/1/0437/9164/6880/files/39177165214.pdf
    • https://cdn.shopify.com/s/files/1/0431/5850/3584/files/74983394409.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/meaning_of_budgetary_control.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/95101925332.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/tozaxaze.pdf
    • https://cdn.shopify.com/s/files/1/0430/4309/4677/files/19640093440.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/wezipol.pdf
    • https://cdn.shopify.com/s/files/1/0432/1142/3902/files/91171596434.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/71402158257.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/2307192651.pdf
    • https://cdn.shopify.com/s/files/1/0431/3468/1250/files/13238059364.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_off00005ca5.bin
392d0f60a1752fdd69a69a3c567549d854a4f872dc666606d2c2d69427f1ee74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA5 5352 bytes
font_01_sfnt_off00006eed.bin
c0ba4a66723d0a72b1fd67a0447b8fddbc1cda0f064939f989c664d423fe6962		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EED 10820 bytes

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