Malicious PDF — malware analysis report

Static analysis result for SHA-256 d46b36c940b38c35…

MALICIOUS

PDF

44.0 KB Created: 2020-08-05 18:32:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5a6ca12868fd5003124a051d9d0caf0 SHA-1: 314fd0e1f302eb189e8b0dc2db04cd9187489410 SHA-256: d46b36c940b38c35181eb21ec03123dfaa3d5aa9be175d2cca63613e2ef957a2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation. One critical heuristic indicates a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=biomassa+livro+pdf'. Another heuristic flags the presence of visible command execution instructions, likely involving Windows scripting tools, indicating a potential for further malicious activity. The document body itself is heavily obfuscated but contains the malicious URL, reinforcing the lure.

Heuristics 4

  • 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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=biomassa+livro+pdf
    • http://menuvu.anclotedesign.com/uploads/1/3/2/7/132740405/7908259.pdf
    • http://files.whitridgewellness.com/uploads/1/3/0/8/130814346/bedenobozexora.pdf
    • http://files.ahavaburms.com/uploads/1/3/1/8/131856134/lekalokodav.pdf
    • http://files.socta.info/uploads/1/3/0/8/130815026/nebanim.pdf
    • https://cdn.shopify.com/s/files/1/0437/7139/6257/files/zejetebapi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0164/2135/files/toefl_ibt_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/17059951000.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/advantages_of_social_media_in_workplace.pdf
    • https://cdn.shopify.com/s/files/1/0429/7365/9290/files/gakajokufadelovozufinap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5797/9304/files/68810768056.pdf
    • https://cdn.shopify.com/s/files/1/0434/3952/1959/files/muvarirenemiwageli.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/how_to_stop_mac_from_sleeping.pdf
    • https://cdn.shopify.com/s/files/1/0437/7998/1470/files/curl_form_post.pdf
    • https://cdn.shopify.com/s/files/1/0428/4982/9023/files/xazopuxoj.pdf
    • https://cdn.shopify.com/s/files/1/0428/6794/9724/files/18468844708.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89832202682.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/26443777516.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_off00006eac.bin
effa245e0be57c7ff58638be5dfc6e62307c778abb08c12e74a296a352cdf633
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAC 5296 bytes
font_01_sfnt_off0000809e.bin
c4cc136333fae64d3d3e45a6ab77a252ec57d5ac2465a3440832cbb7626802fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x809E 10140 bytes