Malicious PDF — malware analysis report

Static analysis result for SHA-256 2675e5cd8a19c858…

MALICIOUS

PDF

51.0 KB Created: 2020-08-08 12:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32339d9572cf0678ab1f0befcf8976ed SHA-1: 70eb818f2e299a9513eadd0f4cf8fc4e4183fa98 SHA-256: 2675e5cd8a19c858fb761dc641f1cd0a022cac9f6de05c018c44e2a03c305dc3
168 Risk Score

Malware Insights

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

The PDF contains a mass link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a PDF reader download. The presence of a visible LOLBin command execution instruction further supports a malicious intent to redirect users to harmful content.

Heuristics 5

  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=c%25E1%25BA%25AFt+pdf+b%25E1%25BA%25B1ng+foxit+reader
    • http://wimubun.stonecomfort.com/uploads/1/3/1/3/131384635/c3999cbef.pdf
    • http://files.theamericancurlstandard.com/uploads/1/3/1/4/131453259/aaefbebca.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://files.cvdeveloper.com/uploads/1/3/1/4/131454012/3663858.pdf
    • https://cdn.shopify.com/s/files/1/0435/2812/6618/files/21027530022.pdf
    • https://cdn.shopify.com/s/files/1/0431/1485/6610/files/kp_astrology_books_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2092/7644/files/acids_and_alkalis_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/dukaroxedebunuxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/9177/7952/files/manual_roller_bending_machine_project.pdf
    • https://cdn.shopify.com/s/files/1/0436/2724/9826/files/96853604714.pdf
    • https://cdn.shopify.com/s/files/1/0437/8044/0213/files/autocad_2020_manual_cz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/rilekor.pdf
    • https://cdn.shopify.com/s/files/1/0433/1061/2635/files/78183251032.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/tomefudivijupazog.pdf
    • https://cdn.shopify.com/s/files/1/0432/8649/5397/files/93196408910.pdf
    • https://cdn.shopify.com/s/files/1/0446/6756/8291/files/history_of_taj_mahal_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0443/3071/3244/files/wonderful_christmas_time_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0435/2992/8872/files/soburaki.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_off000063ef.bin
cb640c5de9c0f6def50a91154befdcbb36763b7a0d4dcd914ddd7450a0373ff0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63EF 5596 bytes
font_01_sfnt_off0000759e.bin
a4ebca66d5a60bdc65199073c6b118037b55708f83a2b6d99b8f9d4a94431d4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x759E 10180 bytes
font_02_sfnt_off000098aa.bin
bc7e3f6831be34686de02ce7be2a06b9f1fa2b1a298201cd6e3dc3baf4672bf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x98AA 16376 bytes
font_03_sfnt_off0000ae51.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE51 4324 bytes

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