Malicious PDF — malware analysis report

Static analysis result for SHA-256 4efc40cef976982d…

MALICIOUS

PDF

45.1 KB Created: 2020-08-14 05:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e3c9d8f1cdef36181c6755f37b59f4d SHA-1: 6118f4434c52c4e33b98b1b5883fe3f3e3357de1 SHA-256: 4efc40cef976982d197535e6b2ed410be4bd2710bf7ac1e38c1344f2d74cce37
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large number of external links, suggesting a link farm designed to distribute malicious content. The embedded URL 'https://ttraff.ru/pify?keyword=clauses+and+phrases+1.+1+answers' is identified as a malicious redirector. The document body contains obfuscated text and numerous links, including benign ones hosted on Shopify and potentially malicious ones on other domains, reinforcing the attack pattern of redirecting users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=clauses+and+phrases+1.+1+answers
    • http://lenafe.biglittlebrains.com/uploads/1/3/1/8/131856725/komipu.pdf
    • http://tolugetot.brucedelfosse.com/uploads/1/3/0/9/130969465/342286.pdf
    • http://files.quillviolet.com/uploads/1/3/0/8/130873983/7389692.pdf
    • http://files.divorcecoachingandconsulting.com/uploads/1/3/0/8/130874518/bejam-soselovorifat-tekumubobup-powidonuvewadar.pdf
    • https://cdn.shopify.com/s/files/1/0432/6585/1542/files/76813570275.pdf
    • https://cdn.shopify.com/s/files/1/0429/3145/4119/files/97594098184.pdf
    • https://cdn.shopify.com/s/files/1/0431/1570/8573/files/demufepofufolepi.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/carcassi_guitarra.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xazijejizamoketabuguta.pdf
    • https://cdn.shopify.com/s/files/1/0437/9151/5808/files/demegojitiwedatoxufogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/xitafot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2170/5124/files/panefunudi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4486/2114/files/home_access_center_keller.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8362/files/nufowoka.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/talugalodobip.pdf
    • https://cdn.shopify.com/s/files/1/0431/6397/5835/files/15897713771.pdf
    • https://cdn.shopify.com/s/files/1/0430/6839/1591/files/84939698480.pdf
    • https://cdn.shopify.com/s/files/1/0433/8214/5182/files/kuravidopo.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_off00006518.bin
30bfd0f53bb861c1d0f9108b7300d39be3c42650142c9d9815133d1ab398df73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6518 4892 bytes
font_01_sfnt_off000075b7.bin
49a3d6abf23a89b6045bdf05f26972078dae5959245ce657402eb0b6e8a99e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75B7 10492 bytes
font_02_sfnt_off00009954.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9954 4324 bytes

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