Malicious PDF — malware analysis report

Static analysis result for SHA-256 51f6a7ea9cc3e442…

MALICIOUS

PDF

36.1 KB Created: 2020-08-09 19:49:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4bd1231165d0cab5693e29b54fceda3e SHA-1: d3230cd69033566c6fba219ad5eba230ef62bddc SHA-256: 51f6a7ea9cc3e4426ae63b83f8d3c28fb9a0e09975eaf4d1712001b835e346a5
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=imagine+dragons+shots+piano+sheet+music+pdf'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The document body, though heavily corrupted, contains fragments of the lure text and the malicious URL. The primary attack pattern involves redirecting the user to a malicious site under the guise of providing sheet music.

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=imagine+dragons+shots+piano+sheet+music+pdf
    • http://files.valledefiladelfia.net/uploads/1/3/0/9/130969368/lumisepuperowowoso.pdf
    • http://files.bayareanaturalbirth.com/uploads/1/3/1/8/131856743/8245661.pdf
    • http://files.graceunderthesea.com/uploads/1/3/0/8/130813906/vavovedu.pdf
    • http://files.keepanopenmind.net/uploads/1/3/0/8/130814642/354913.pdf
    • https://cdn.shopify.com/s/files/1/0435/5129/3599/files/difenojataxegofavigugor.pdf
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/91022240723.pdf
    • https://cdn.shopify.com/s/files/1/0434/1478/2119/files/ct_file_bng_foxit_reader_online.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2534/files/53084966430.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/converter_to_word_format.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7314/files/52119380733.pdf
    • https://cdn.shopify.com/s/files/1/0437/3502/3765/files/love_and_other_drugs_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0431/5339/1765/files/59139305693.pdf
    • https://cdn.shopify.com/s/files/1/0438/5410/2688/files/67134960425.pdf
    • https://cdn.shopify.com/s/files/1/0429/6874/4087/files/39017977439.pdf
    • https://cdn.shopify.com/s/files/1/0436/2135/1587/files/676807649.pdf
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/pegukor.pdf
    • https://cdn.shopify.com/s/files/1/0431/9726/8128/files/19185623465.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_off00004ca5.bin
7381b659c2c8194085ae9f5de33f925ff1d45c575c77fa506e7c390081c4ff43		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CA5 5476 bytes
font_01_sfnt_off00005f19.bin
4bb1339068477feb06ba9f32fa87c061cb81f21e2b5f5b9d6f51d213cdfc49bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F19 10524 bytes

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