Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc855d9f5aaae3d2…

MALICIOUS

PDF

39.0 KB Created: 2020-08-07 20:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6068cd9a30986117cfdfb60e81f7ab9f SHA-1: 5d536b92005bb7217b8587d0aad57e0869823861 SHA-256: bc855d9f5aaae3d2d06bad5da51681ff97de4c425d4d9a39875490700e1b4624
120 Risk Score

Malware Insights

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

The PDF file contains a link farm of 16 external PDF documents, with one link pointing to a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=bratstvo+crnog+bode%25C5%25BEa+3+pdf. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

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=bratstvo+crnog+bode%25C5%25BEa+3+pdf
    • http://files.well-estar.com/uploads/1/3/1/6/131637034/91a0067.pdf
    • http://files.bjorkartstudio.com/uploads/1/3/1/3/131384374/fadezomoramute.pdf
    • http://files.westindiessoul.com/uploads/1/3/1/4/131482853/luxotusirukedopu.pdf
    • http://files.toniabasihill.com/uploads/1/3/2/7/132740424/a96c706e.pdf
    • https://cdn.shopify.com/s/files/1/0427/7728/0671/files/93636168393.pdf
    • https://cdn.shopify.com/s/files/1/0435/0522/1784/files/53228487216.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/cge_pro_manual.pdf
    • https://cdn.shopify.com/s/files/1/0436/1958/2110/files/33786524576.pdf
    • https://cdn.shopify.com/s/files/1/0439/0282/8699/files/statistics_david_freedman_solution_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/4062/1222/files/goxenepofevabumarodaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/adrenal_insufficiency.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tivaluzisezulumavolo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/banen.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1935/files/4419326844.pdf
    • https://cdn.shopify.com/s/files/1/0434/2215/4908/files/49954708202.pdf
    • https://cdn.shopify.com/s/files/1/0433/7106/9594/files/pomibelepatazuw.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_off0000480c.bin
a3d8e2b7411231e8595af2f931b25ca84b8f38fa70a4af7eaeeef0345729faaf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x480C 5784 bytes
font_01_sfnt_off00005bcf.bin
d8e4b7f44dfb66ea49c7f1cefd345a391fade3fb548cc17de4cdbf151663dabd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BCF 6068 bytes
font_02_sfnt_off00006b7f.bin
861ca41b885c4f31b5bf25609aeca79de85e9b5583a8cc4bf0e8fc808ea84ab1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B7F 9776 bytes

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