Malicious PDF — malware analysis report

Static analysis result for SHA-256 2adf9e91b29d7416…

MALICIOUS

PDF

55.9 KB Created: 2020-08-25 04:18:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 504aa0f1f44122f197ccbd9bb3c6d0af SHA-1: 7a2b8db6eb34297d5956a42d859a3629f0e2f75c SHA-256: 2adf9e91b29d7416a2a9a88f9fcef5dc59bcc740edf1e91fda1a123811307079
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, identified as a PDF link farm. One of these links, 'https://ttraff.ru/pify?keyword=friends+anthem+video+song', is flagged as malicious and acts as a redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it's the primary lure. The file's purpose appears to be directing users to malicious infrastructure.

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=friends+anthem+video+song
    • http://files.railroadbrewingco.com/uploads/1/3/0/7/130738628/rabebojo_pezimanan.pdf
    • http://files.difrancosings.com/uploads/1/3/0/8/130873869/8207825.pdf
    • https://cdn.shopify.com/s/files/1/0434/0475/5096/files/786597867.pdf
    • https://cdn.shopify.com/s/files/1/0437/4528/0161/files/academic_writing_answer_key_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/0940/1251/files/1474129784.pdf
    • https://cdn.shopify.com/s/files/1/0433/6173/0719/files/32704308466.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/93814383780.pdf
    • https://cdn.shopify.com/s/files/1/0428/7512/5919/files/jegaxekoduniwezepipefe.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/45480651449.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/duwamobol.pdf
    • https://cdn.shopify.com/s/files/1/0432/4704/2728/files/gemajukoxo.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/zipixuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/potevinegusujej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4827/2023/files/eclipse_for_javascript_free.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_off00007aaf.bin
03dc17cbf652345e2aa84afea83dd91a5248c1016e07d910eab2673fa2104966		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AAF 5012 bytes
font_01_sfnt_off00008b8b.bin
8121478b86b65974c53dd8d52eab600967bdbda00b685c1be8dbc15646d4873b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B8B 10620 bytes
font_02_sfnt_off0000affe.bin
378ba5569bb666bbcf62f6b10ce7b1b17e3ec70dff13df96b0486da8cd924b4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFE 16064 bytes
font_03_sfnt_off0000c4a1.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 4324 bytes

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