Malicious PDF — malware analysis report

Static analysis result for SHA-256 253e0f87351b4d44…

MALICIOUS

PDF

36.3 KB Created: 2020-08-09 23:41:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d683a488e0cffec6f54d88325a97e86b SHA-1: 1d0fd6bb7450bb52433a20655eb7dc476f61fea1 SHA-256: 253e0f87351b4d4493eaa6c462ed813244f208c8514bfef55847f36a9b8529ac
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM. One of the primary links, 'https://ttraff.cc/pify?keyword=pen+ink+drawing+alphonso+dunn+pdf', is identified as a malicious redirector. The document body also contains visible instructions or command text involving Windows script/execution tools, as indicated by the SE_LOLBIN_RUN_COMMAND heuristic, suggesting an attempt to execute further malicious code.

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.cc/pify?keyword=pen+ink+drawing+alphonso+dunn+pdf
    • http://files.ozgrav.org/uploads/1/3/0/7/130775866/22a8d9637.pdf
    • http://nodizol.nalomelihoney.com/uploads/1/3/0/7/130738870/814929.pdf
    • http://tenemevek.evalefkowitz.com/uploads/1/3/1/4/131453045/e2c9f73862e7.pdf
    • https://cdn.shopify.com/s/files/1/0434/4204/5090/files/50222037560.pdf
    • https://cdn.shopify.com/s/files/1/0432/1103/0683/files/tofime.pdf
    • https://cdn.shopify.com/s/files/1/0429/2804/6233/files/58974408519.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/tifiwawafisisebazawos.pdf
    • https://cdn.shopify.com/s/files/1/0440/8151/2613/files/sadewuteviduzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4936/1314/files/fomezejifigubaparujege.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xopiforosolakalaxelavur.pdf
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/what_is_curl.pdf
    • https://cdn.shopify.com/s/files/1/0430/1229/2767/files/captain_sim_757_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/mtg_arena_crashing.pdf
    • https://cdn.shopify.com/s/files/1/0429/2152/5407/files/1001_questions_mcat_biology.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_off000043de.bin
613fa5220e5e390de9412991a1fbd2466857b3bf9e806d3040b1cbdf30e51dec
pdf-font-stream PDF embedded font (sfnt) at offset 0x43DE 5260 bytes
font_01_sfnt_off000055c0.bin
c03593b20ead3fe76a37c386c7817cd2226ea8e6111b5af015a0a0b917b9e30d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C0 9464 bytes
font_02_sfnt_off00007623.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333
pdf-font-stream PDF embedded font (sfnt) at offset 0x7623 4324 bytes